def foc(gov_policies, psi, sig, start=0, end=10):
# Initialize local variables for government policies for better
# readability.
tax = gov_policies[0]
trans = gov_policies[1]
result = []
# Compute different parts of first FOC (respect tax rate) and combine
part_a = integrate.quad(
lambda w: dell_u_tax(w, cons(w, tax, psi, trans),
hours(w, tax, psi), psi, tax) * lognorm.pdf(
w, s=sig, scale=np.exp(-sig**2 / 2)),
0, 10 # set integration borders
)[0]
part_b = integrate.quad(
lambda w: w * hours(w, tax, psi), start, end
)[0]
# Compute first part of the second FOC (respect transfers)
part_c = integrate.quad(
lambda w: lognorm.pdf(w, s=sig, scale=np.exp(-sig**2 / 2)) *
dell_u_trans(cons(w, tax, psi, trans), hours(w, tax, psi), psi),
start, end
)[0]
# Store first foc in results vector
result.append(part_a + part_c * part_b)
# Compute budget constraint
bud_const = trans - integrate.quad(
lambda w: tax * w * hours(w, tax, psi), start, end
)[0]
result.append(bud_const)
return result
def MakeLNSmoother(maxn, offset, width):
offset = np.log(offset)
nrmf = sum([lognorm.pdf(i-maxn,offset+maxn,width) for i in range(-int(maxn*max(width,1)*4),int(maxn*max(width,1)*4)) if (i-maxn) > 0])
smoother = np.zeros(2*maxn)
for k in range(1,maxn):
smoother[k+maxn] = lognorm.pdf(k,offset,width)/nrmf
return {'MaxN':maxn, 'Smoother':smoother}
def Delta():
sigma=1
func1= lambda xx: norm.pdf(xx,0,sigma)
#func2= lambda xx: norm.pdf(xx,0,0.1)
func3= lambda z: lognorm.pdf(z,1)
#print 1 - integrate.quad(func1,-4*sigma,4*sigma)[0]
print 1 - integrate.quad(func3,0,10)[0]
x=arange(-1,10,0.1)
#y1=map(func1,x)
#y2=map(func2,x)
y3=map(func3,x)
#plt.plot(x,y1)
#plt.plot(x,y2)
#plt.plot(x,y3)
#plt.show()
jeffreys= lambda z: 1/math.sqrt(z+1.5)
jeffreys2= lambda z: 1/math.sqrt(z+15)
xxx=arange(0,2.6,0.1)
y=map(jeffreys,xxx)
yy=map(jeffreys2,xxx)
plot1, =plt.plot(xxx,y)
plot2, =plt.plot(xxx,yy,'r')
plt.xlabel('Signal strength')
plt.ylabel('Jeffreys prior')
plt.legend([plot1,plot2],['s=1.0, b=1.5','s=1.0, b=15.0'])
#plt.show()
print jeffreys(0)/jeffreys(1)
def familiarity(self, Ytest, ytrmean = None, ytrstd=None, sigma2=None):
#def my_logpdf(y, ymean, yvar):
# import numpy as np
# N = y.shape[0]
# ln_det_cov = N * np.log(yvar)
# return -0.5 * (np.sum((y - ymean) ** 2 / yvar) + ln_det_cov + N * np.log(2. * np.pi))
#from scipy.stats import multivariate_normal
#var = multivariate_normal(mean=[0,0], cov=[[1,0],[0,1]])
#var.pdf([1,0])
from scipy.stats import lognorm
assert(self.type == 'bgplvm')
import numpy as np
N = Ytest.shape[0]
if ytrmean is not None:
Ytest -= ytrmean
Ytest /= ytrstd
qx, mm = self.model.infer_newX(Ytest)
#ymean, yvar = model._raw_predict(qx)
# This causes the code to hang!!! Replace qx with qx.mean.values...!!!!
ymean, yvar = self.model.predict(qx)
ll = np.zeros(N)
for j in range(N):
#ll[j] = my_logpdf(Ytest[j], ymean[j], yvar[j])
#ll[j] = multivariate_normal(mean=ymean[j], cov=np.diag(yvar[j])).pdf(Ytest[j])
ll[j] = lognorm.pdf(Ytest[j], s=1, loc=ymean[j], scale=yvar[j]).mean()
loglike = ll.mean()
return loglike
def plot_histogram(data_sets, attribute_names, range, fit_dist='', ylabel='', title='', bins=20, normed=1, histtype='bar', facecolor='#0099FF', log=0):
data_to_plot = retrieve_attributes_by_name(data_sets, attribute_names)
n, bins, patches = plt.hist(data_to_plot[0], bins=bins, range=range, normed=1, histtype=histtype, facecolor='#0099FF', log=0)
if fit_dist is 'normal':
mu, sigma = data_to_plot.mean(), data_to_plot.std() # obtain samplemean and sample standard deviation from array
y = mlab.normpdf( bins, mu, sigma) # obtain the corresponding distribution
l = plt.plot(bins, y, 'r--', linewidth=1) # plot the distribution
if fit_dist is 'uniform':
uniform_pdf = 1 / (range[1] - range[0]) # U_pdf(x) := 1 / (b - a), horizontal line with (a, b)=range
l = plt.plot(range, (uniform_pdf, uniform_pdf), 'r-', linewidth=2) # plot the uniform pdf
if fit_dist is 'exponential':
k = data_to_plot.mean() # the sample mean is MLE estimate of lambda ('k') of exp. dist.
x = np.linspace(expon.ppf(0.01, scale=k), expon.ppf(0.99, scale=k), 100)
l = plt.plot(x, expon.pdf(x, scale=k), 'r--', linewidth=1)
if fit_dist is 'lognormal':
data_to_plot[np.where(data_to_plot==0)] = 0.0001
x = np.log(data_to_plot)
print x
mu, sigma = x.mean(), x.std()
print '%d %d', mu, sigma
y = lognorm.pdf(x=bins, s=sigma, loc=mu, scale=math.exp(mu))
l = plt.plot(bins, y, 'r--', linewidth=1)
plt.ylabel(ylabel)
plt.xlabel(attribute_names)
plt.title(title)
plt.grid(True)
plt.show()
def prob_gate(pointPOS,gatePOS): ''' compute probability according to lognormal distribution base on gate ''' d = math.sqrt((gatePOS[0]-pointPOS[0])**2+(gatePOS[1]-pointPOS[1])**2) mu = (2*math.log(4.700) + math.log(3.877)) / float(3) delta = math.sqrt(2/3*(math.log(4.7)-math.log(3.877))) return d,lognorm.pdf(d,mu,delta)
def createHisto(histoData1, histoData2, imageName1, imageName2):
"""
Creates a diagram showing two histograms.
"""
fig = plt.figure()
plt.subplot(111)
data1 = histoData1['data']
data2 = histoData2['data']
n, bins, patches = plt.hist(data1, _NUMBER_OF_HISTO_BARS, range=(0, data1.max()), normed=0, \
weights=np.zeros_like(data1)+1./data1.size, facecolor=_COLOR_FIRST_DATA[0], alpha=0.4, label=imageName1)
n2, bins2, patches = plt.hist(data2, _NUMBER_OF_HISTO_BARS, range=(0, data2.max()), normed=0, \
weights=np.zeros_like(data2)+1./data2.size, facecolor=_COLOR_SECOND_DATA[0], alpha=0.4, label=imageName2)
# 'best fit' line
shape, loc, scale = lognorm.fit(data1, floc=0) # Fit a curve to the variates
maximum = data1.max() if data1.max()>data2.max() else data2.max()
x = np.linspace(0, 1.2 * maximum, num=500)
# scaling
binlength = bins[1] - bins[0]
alpha = factorize(n, binlength)
shape2, loc2, scale2 = lognorm.fit(data2, floc=0) # Fit a curve to the variates
# scaling
binlength2 = bins2[1] - bins2[0]
alpha2 = factorize(n2, binlength2)
# plot functions
simplefilter("ignore", RuntimeWarning) # avoid warning in this method
# plt.plot(bins[1:], n, 'b^', alpha=0.5)
plt.plot(x, alpha * (lognorm.pdf(x, shape, loc=0, scale=scale)), _COLOR_FIRST_DATA[1]+'--')
# plt.plot(bins2[1:], n2, 'g^', alpha=0.5)
plt.plot(x, alpha2 * (lognorm.pdf(x, shape2, loc=0, scale=scale2)), _COLOR_SECOND_DATA[1]+'--')
axe = plt.axis()
newaxe =(axe[0], 1.2 * maximum, axe[2], axe[3])
plt.axis(newaxe)
plt.title(histoData1['title'])
plt.ylabel(u'Relative frequency ' + r'$\left[\mathrm{\mathsf{ \frac{N}{\Sigma N} }}\right]$')
plt.xlabel(histoData1['xlabel'])
simplefilter("default", RuntimeWarning)
# position the legend
plt.legend(loc=0, frameon=0)
plt.minorticks_on()
return fig
def galoc_fun(x): cs = np.arange(-20,(50+step),step) mu0 = (1-(mcheck+Mshift)/mmm)*((pa[0]*(mcheck-(pa[5]-Mshift))**2 \ + pa[1]*(mcheck-(pa[5]-Mshift)) + pa[2])**pa[4] + pa[3]) rho0 = VarPars.x[0]*(10**5)*((10)**(VarPars.x[1]*(mcheck+Mshift-11))) n = len(cs) res = np.zeros((n)) for i in xrange(0,n): res[i] = lognorm.pdf(x, np.sqrt(np.log(1 + rho0/(mu0**2.0))), 0,\ np.exp(np.log(mu0)-( (1/2.0)*np.log( 1 + rho0/(mu0**2.0) ) )))*dstar(cs[i]-x,starparas) return res
def createHisto(A, title='', xlabel='', unit=''):
"""
Generates one histogram of the given data.
"""
fig = plt.figure()
ax = plt.subplot(111)
n, bins, patches = plt.hist(A, _NUMBER_OF_HISTO_BARS, range=(0, A.max()), normed=0, \
weights=np.zeros_like(A)+1./A.size, facecolor='cyan', alpha=0.4, label=' ')
# set min and max values to return
values = {}
values['min'] = A.min()
values['minrf'] = n[np.nonzero(n)][0]
values['max'] = A.max()
values['maxrf'] = n[-1]
numbers = title+"\nx: "+str(bins[1:])+"\ny: "+str(n)+"\n\n"
# 'best fit' line
shape, loc, scale = lognorm.fit(A, floc=0) # Fit a curve to the variates
x = np.linspace(0, 1.2 * A.max(), num=500)
# scaling
binlength = bins[1] - bins[0]
alpha = factorize(n, binlength)
# plot functions
simplefilter("ignore", RuntimeWarning) # avoid warning in this method
plt.plot(bins[1:], n, 'c^', alpha=0.5, label='Distribution')
plt.plot(x, alpha * (lognorm.pdf(x, shape, loc=0, scale=scale)), 'c--', label='Fit')
axe = plt.axis()
newaxe =(axe[0], 1.2 * A.max(), axe[2], axe[3])
plt.axis(newaxe)
plt.title(title)
plt.ylabel(u'Relative frequency ' + r'$\left[\mathrm{\mathsf{ \frac{N}{\Sigma N} }}\right]$')
plt.xlabel(xlabel)
simplefilter("default", RuntimeWarning)
# position the legend
handles, labels = ax.get_legend_handles_labels()
indexL3 = labels.index(' ')
labelsL3 = [labels[indexL3]]
handlesL3 = [handles[indexL3]]
del labels[indexL3]
del handles[indexL3]
l1 = plt.legend(handlesL3, labelsL3, prop={'size':12}, bbox_to_anchor=(0.72, 0.99), loc=2, frameon=0)
plt.legend(handles, labels, prop={'size':12}, bbox_to_anchor=(0.72, 0.99), loc=2, frameon=0)
plt.gca().add_artist(l1)
currentaxis = fig.gca()
legendText = '$\mathrm{\mathsf{\mu =}}$ %4.2f '+unit+'\n$\mathrm{\mathsf{\sigma =}}$ %4.2f '+unit
plt.text(0.96, 0.86, legendText % (scale, (shape * scale)), horizontalalignment='right', \
verticalalignment='top', transform=currentaxis.transAxes)
plt.minorticks_on()
return fig, values, numbers
def FitPrice(data): priceData = data[:,6] priceData = priceData[~sp.isnan(priceData)] shape, loc, scale = lognorm.fit(priceData,loc = 0) x = np.linspace(0, 100, 100) p = lognorm.pdf(x, shape, loc, scale) maxIndex = 0 for i in range(0, len(p)): if p[i] >= p[maxIndex]: maxIndex = i else: break; # if the plot goes down, stop searching. return x[maxIndex]
def _wrapper_baseline(alpha, shape, x):
""" This private function constructs the integrand for the application of
numerical integration strategies.
"""
# Guard interface.
assert basic_checks('_wrapper_baseline', 'in', alpha, shape, x)
# Evaluate utility and weigh by probability.
rslt = baseline_utility(x, alpha) * lognorm.pdf(x, shape)
# Check result.
assert basic_checks('_wrapper_baseline', 'out', rslt)
# Finishing
return rslt
def hist(x, weights=None, bins=10, distname='normal', color='b', label='pdf', filename=None):
# create full data using weights
z = x
if weights is not None:
z = np.zeros(sum(weights))
j = 0
for i in range(weights.size):
for k in range(j, j + weights[i]):
z[j] = x[i]
j += 1
# histogram
hist, bins = np.histogram(x, bins=bins, density=True, weights=weights)
# fit distribution
if distname is 'normal':
(mu, sigma) = norm.fit(z)
pdf = lambda x: norm.pdf(x, mu, sigma)
elif distname is 'lognormal':
sigma, loc, scale = lognorm.fit(z, floc=0)
mu = np.log(scale)
pdf = lambda x: lognorm.pdf(x, sigma, loc, scale=scale)
elif distname is not None:
raise Exception('Unsupported distribution name ' + distname)
# plot distribution
if (distname is not None):
x = np.linspace(bins[0], bins[-1], 100)
y = pdf(x)
label = 'm=%2.1f, s=%2.1f [%s]' % (mu, sigma, label)
plt.plot(x, y, linewidth=3, label=label, alpha=0.7, color=color)
# plot histogram
c = (bins[:-1] + bins[1:]) / 2; # bins centers
plt.plot(c, hist, marker='s', alpha=0.7, markersize=8, linestyle='None', color=color)
# format plot
plt.xticks(fontsize=14)
plt.yticks(fontsize=14)
plt.ylabel('PDF', fontsize=16)
if (filename is not None):
print('Saving figure ' + filename)
plt.savefig(filename, bbos_inches='tight')
def make_csd(shape, scale, npart, show_plot=False):
"""Create cell size distribution and save it to file."""
if shape == 0:
rads = [scale + 0 * x for x in range(npart)]
else:
rads = lognorm.rvs(shape, scale=scale, size=npart)
with open('diameters.txt', 'w') as fout:
for rad in rads:
fout.write('{0}\n'.format(rad))
if shape == 0:
xpos = linspace(scale / 2, scale * 2, 100)
else:
xpos = linspace(lognorm.ppf(0.01, shape, scale=scale),
lognorm.ppf(0.99, shape, scale=scale), 100)
plt.plot(xpos, lognorm.pdf(xpos, shape, scale=scale))
plt.hist(rads, normed=True)
plt.savefig('packing_histogram.png')
plt.savefig('packing_histogram.pdf')
if show_plot:
plt.show()
def ddPDF(pts, mu, sigma, distribuition, outlier=0, data=0, n=10, seed=None):
import numpy as np
from scipy.interpolate import interp1d
from distAnalyze import ddpdf, mediaMovel
from scipy.stats import norm, lognorm
from someFunctions import ash
eps = 5e-5
ngrid = int(1e6)
#ddy = lambda x,u,s: abs(-(s**2-u**2+2*u*x-x**2)/(s**5*sqrt(2*pi))*np.exp(-0.5*((u-x)/s)**2))
if distribuition == 'normal':
outlier_inf = outlier_sup = outlier
if not data:
inf, sup = norm.interval(0.9999, loc=mu, scale=sigma)
x = np.linspace(inf - outlier_inf, sup + outlier_sup, ngrid)
y = ddpdf(x, mu, sigma, distribuition)
else:
np.random.set_state(seed)
d = np.random.normal(mu, sigma, data)
inf, sup = min(d) - outlier_inf, max(d) + outlier_sup
#y,x = np.histogram(d,bins = 'fd',normed = True)
#x = np.mean(np.array([x[:-1],x[1:]]),0)
x, y = ash(d)
y = abs(np.diff(y, 2))
x = x[:-2] + np.diff(x)[0]
#y = abs(np.diff(mediaMovel(y,n),2))
#x = x[:-2]+np.diff(x)[0]
y = y / (np.diff(x)[0] * sum(y))
elif distribuition == 'lognormal':
outlier_inf = 0
outlier_sup = outlier
inf, sup = lognorm.interval(0.9999, sigma, loc=0, scale=np.exp(mu))
inf = lognorm.pdf(sup, sigma, loc=0, scale=np.exp(mu))
inf = lognorm.ppf(inf, sigma, loc=0, scale=np.exp(mu))
if not data:
x = np.linspace(inf - outlier_inf, sup + outlier_sup, ngrid)
y = ddpdf(x, mu, sigma, distribuition)
else:
np.random.set_state(seed)
d = np.random.lognormal(mu, sigma, data)
#inf,sup = min(d)-outlier_inf,max(d)+outlier_sup
# y,x = np.histogram(d,bins = 'fd',normed = True)
#x = np.mean(np.array([x[:-1],x[1:]]),0)
x, y = ash(d)
y = y[x < sup]
x = x[x < sup]
y = abs(np.diff(y, 2))
#y = abs(np.diff(mediaMovel(y,n),2))
x = x[:-2] + np.diff(x)[0]
y = y / (np.diff(x)[0] * sum(y))
#cdf = np.sum(np.tri(len(x))*y,1)
cdf = np.cumsum(y)
# =============================================================================
# for i in range(1,ngrid):
# cdf.append(y[i]+cdf[i-1])
cdf = cdf / max(cdf)
#
# =============================================================================
interp = interp1d(cdf, x, fill_value='extrapolate')
Y = np.linspace(eps, 1 - eps, pts)
X = interp(Y)
return X, Y
def diffArea(nest,
outlier=0,
data=0,
kinds='all',
axis='probability',
ROI=20,
mu=0,
sigma=1,
weight=False,
interpolator='linear',
distribuition='normal',
seed=None,
plot=True):
"""
Return an error area between a analitic function and a estimated discretization from a distribuition.
Parameters
----------
nest: int
The number of estimation points.
outlier: int, optional
Is the point of an outlier event, e.g outlier = 50 will put an event in -50 and +50 if mu = 0.
Defaut is 0
data: int, optional
If data > 0, a randon data will be inserted insted analitcs data.
Defaut is 0.
kinds: str or array, optional
specifies the kind of distribuition to analize.
('Linspace', 'CDFm', 'PDFm', 'iPDF1', 'iPDF2', 'all').
Defaut is 'all'.
axis: str, optional
specifies the x axis to analize
('probability', 'derivative', '2nd_derivative', 'X').
Defaut is 'probability'.
ROI: int, optional
Specifies the number of regions of interest.
Defaut is 20.
mu: int, optional
Specifies the mean of distribuition.
Defaut is 0.
sigma: int, optional
Specifies the standard desviation of a distribuition.
Defaut is 1.
weight: bool, optional
if True, each ROI will have a diferent weight to analyze.
Defaut is False
interpolator: str, optional
Specifies the kind of interpolation as a string
('linear', 'nearest', 'zero', 'slinear', 'quadratic', 'cubic'
where 'zero', 'slinear', 'quadratic' and 'cubic' refer to a spline
interpolation of zeroth, first, second or third order) or as an
integer specifying the order of the spline interpolator to use.
Default is 'linear'.
distribuition: str, optional
Select the distribuition to analyze.
('normal', 'lognormal')
Defaut is 'normal'
plot: bool, optional
If True, a plot will be ploted with the analyzes
Defaut is True
Returns
-------
a, [b,c]: float and float of ndarray. area,[probROIord,areaROIord]
returns the sum of total error area and the 'x' and 'y' values.
"""
import numpy as np
from scipy.stats import norm, lognorm
from scipy.interpolate import interp1d
from numpy import exp
import matplotlib.pyplot as plt
from statsmodels.distributions import ECDF
from distAnalyze import pdf, dpdf, ddpdf, PDF, dPDF, ddPDF
area = []
n = []
data = int(data)
if distribuition == 'normal':
outlier_inf = outlier_sup = outlier
elif distribuition == 'lognormal':
outlier_inf = 0
outlier_sup = outlier
ngrid = int(1e6)
truth = pdf
if axis == 'probability':
truth1 = pdf
elif axis == 'derivative':
truth1 = dpdf
elif axis == '2nd_derivative':
truth1 = ddpdf
elif axis == 'X':
truth1 = lambda x, mu, sigma, distribuition: x
#else: return 'No valid axis'
probROIord = {}
areaROIord = {}
div = {}
if seed is not None:
np.random.set_state(seed)
if data:
if distribuition == 'normal':
d = np.random.normal(mu, sigma, data)
elif distribuition == 'lognormal':
d = np.random.lognormal(mu, sigma, data)
if kinds == 'all':
kinds = ['Linspace', 'CDFm', 'PDFm', 'iPDF1', 'iPDF2']
elif type(kinds) == str:
kinds = [kinds]
for kind in kinds:
if distribuition == 'normal':
inf, sup = norm.interval(0.9999, loc=mu, scale=sigma)
elif distribuition == 'lognormal':
inf, sup = lognorm.interval(0.9999, sigma, loc=0, scale=exp(mu))
inf = lognorm.pdf(sup, sigma, loc=0, scale=np.exp(mu))
inf = lognorm.ppf(inf, sigma, loc=0, scale=np.exp(mu))
xgrid = np.linspace(inf, sup, ngrid)
xgridROI = xgrid.reshape([ROI, ngrid // ROI])
dx = np.diff(xgrid)[0]
if kind == 'Linspace':
if not data:
xest = np.linspace(inf - outlier_inf, sup + outlier_sup, nest)
else:
if distribuition == 'normal':
#d = np.random.normal(loc = mu, scale = sigma, size = data)
inf, sup = min(d), max(d)
xest = np.linspace(inf - outlier_inf, sup + outlier_sup,
nest)
elif distribuition == 'lognormal':
#d = np.random.lognormal(mean = mu, sigma = sigma, size = data)
inf, sup = min(d), max(d)
xest = np.linspace(inf - outlier_inf, sup + outlier_sup,
nest)
yest = pdf(xest, mu, sigma, distribuition)
elif kind == 'CDFm':
eps = 5e-5
yest = np.linspace(0 + eps, 1 - eps, nest)
if distribuition == 'normal':
if not data:
xest = norm.ppf(yest, loc=mu, scale=sigma)
yest = pdf(xest, mu, sigma, distribuition)
else:
#d = np.random.normal(loc = mu, scale = sigma, size = data)
ecdf = ECDF(d)
inf, sup = min(d), max(d)
xest = np.linspace(inf, sup, data)
yest = ecdf(xest)
interp = interp1d(yest,
xest,
fill_value='extrapolate',
kind='nearest')
yest = np.linspace(eps, 1 - eps, nest)
xest = interp(yest)
elif distribuition == 'lognormal':
if not data:
xest = lognorm.ppf(yest, sigma, loc=0, scale=exp(mu))
yest = pdf(xest, mu, sigma, distribuition)
else:
#d = np.random.lognormal(mean = mu, sigma = sigma, size = data)
ecdf = ECDF(d)
inf, sup = min(d), max(d)
xest = np.linspace(inf, sup, nest)
yest = ecdf(xest)
interp = interp1d(yest,
xest,
fill_value='extrapolate',
kind='nearest')
yest = np.linspace(eps, 1 - eps, nest)
xest = interp(yest)
elif kind == 'PDFm':
xest, yest = PDF(nest, mu, sigma, distribuition, outlier, data,
seed)
elif kind == 'iPDF1':
xest, yest = dPDF(nest, mu, sigma, distribuition, outlier, data,
10, seed)
elif kind == 'iPDF2':
xest, yest = ddPDF(nest, mu, sigma, distribuition, outlier, data,
10, seed)
YY = pdf(xest, mu, sigma, distribuition)
fest = interp1d(xest,
YY,
kind=interpolator,
bounds_error=False,
fill_value=(YY[0], YY[-1]))
#fest = lambda x: np.concatenate([fest1(x)[fest1(x) != -1],np.ones(len(fest1(x)[fest1(x) == -1]))*fest1(x)[fest1(x) != -1][-1]])
yestGrid = []
ytruthGrid = []
ytruthGrid2 = []
divi = []
for i in range(ROI):
yestGrid.append([fest(xgridROI[i])])
ytruthGrid.append([truth(xgridROI[i], mu, sigma, distribuition)])
ytruthGrid2.append([truth1(xgridROI[i], mu, sigma, distribuition)])
divi.append(
len(
np.intersect1d(
np.where(xest >= min(xgridROI[i]))[0],
np.where(xest < max(xgridROI[i]))[0])))
diff2 = np.concatenate(
abs((np.array(yestGrid) - np.array(ytruthGrid)) * dx))
#diff2[np.isnan(diff2)] = 0
areaROI = np.sum(diff2, 1)
divi = np.array(divi)
divi[divi == 0] = 1
try:
probROI = np.mean(np.sum(ytruthGrid2, 1), 1)
except:
probROI = np.mean(ytruthGrid2, 1)
probROIord[kind] = np.sort(probROI)
index = np.argsort(probROI)
areaROIord[kind] = areaROI[index]
#deletes = ~np.isnan(areaROIord[kind])
#areaROIord[kind] = areaROIord[kind][deletes]
#probROIord[kind] = probROIord[kind][deletes]
area = np.append(area, np.sum(areaROIord[kind]))
n = np.append(n, len(probROIord[kind]))
div[kind] = divi[index]
if plot:
if weight:
plt.logy(probROIord[kind],
areaROIord[kind] * div[kind],
'-o',
label=kind,
ms=3)
else:
plt.plot(probROIord[kind],
areaROIord[kind],
'-o',
label=kind,
ms=3)
plt.yscale('log')
plt.xlabel(axis)
plt.ylabel('Error')
plt.legend()
#plt.title('%s - Pontos = %d, div = %s - %s' %(j,nest, divs,interpolator))
return area, [probROIord, areaROIord]
plt.show()
#scipy.stats.lognorm.fit
import numpy as np
from scipy.stats import lognorm
import matplotlib.pyplot as plt
mu = 0
sigma = 1
samplenumbers1 = np.random.lognormal(mu,sigma,1000)
samplenumbers2 = lognorm.rvs(sigma,0,np.exp(mu),1000)
shape, loc, scale = lognorm.fit(samplenumbers1, floc=0)
fit_mu = np.log(scale)
fit_sigma = shape
count, bins, ignored = plt.hist(samplenumbers1, 100, density=True, align='mid')
x = np.linspace(min(bins), max(bins), 10000)
pdf1 = ((np.exp(-(np.log(x) - fit_mu)**2 / (2 * fit_sigma**2)) /
(x * fit_sigma * np.sqrt(2 * np.pi))))
pdf2 = lognorm.pdf(x,shape,0,scale)
plt.plot(x, pdf2, linewidth=2, color='r')
plt.axis('tight')
plt.show()
x = np.linspace(2, 22, 4000)
dists = np.array([3.958,3.685,3.897,3.317])
al,loc,beta=lognorm.fit(sig_vals_r)
print al, loc, beta
# plt.plot(x, lognorm.pdf(x, al, loc=loc, scale=beta),'r-', lw=5, alpha=0.6, label='lognormal AGC198606')
print lognorm.cdf(dists, al, loc=loc, scale=beta)
bins, edges = np.histogram(sig_vals_r, bins=400, range=[2,22], normed=True)
centers = (edges[:-1] + edges[1:])/2.
plt.scatter(centers, bins, edgecolors='none', label='histogram of $\sigma$ from 25000 \nuniform random samples')
# x = np.linspace(2, 22, 4000)
# dists = np.array([3.958,3.685,3.897,3.317])
# al,loc,beta=lognorm.fit(valsLP)
# print al, loc, beta
plt.plot(x, lognorm.pdf(x, al, loc=loc, scale=beta),'r-', lw=5, alpha=0.6, label='lognormal distribution')
print lognorm.cdf(dists, al, loc=loc, scale=beta)
ax = plt.subplot(111)
# plt.plot([3.958,3.958],[-1.0,2.0],'k-', lw=5, alpha=1.0, label='best AGC198606 detection')
# plt.plot([10.733,10.733],[-1.0,2.0],'k-', lw=5, alpha=0.5, label='Leo P detection at 1.74 Mpc')
# plt.plot([3.897,3.897],[-1.0,2.0],'k-', lw=5, alpha=0.6, label='d=417 kpc')
# plt.plot([3.317,3.317],[-1.0,2.0],'k-', lw=5, alpha=0.4, label='d=427 kpc')
plt.ylim(0,1.1)
plt.xlim(2,7.5)
plt.xlabel('$\sigma$ above local mean')
plt.ylabel('$P(\sigma = X)$')
plt.legend(loc='best', frameon=False)
ax.set_aspect(2)
# plt.show()
plt.savefig('randdist.eps')
def create_animals(env_dim = 10000, animal_sp = 5, individuals = 30, stage = 0, file_name = "",
inter_mov = 7.1e-5, sl_mov = -0.002):
'''
This function populates a continuous landscape of dimension env_dim (m) with "individuals"
animals of "animal_sp" different species.
'''
# Animal agents
class Animals:
idd = np.arange(1, individuals+1)
coords = np.array([[], []], dtype = float)
sp = np.zeros((individuals,), dtype = int)
seed_n = []
seed_t = []
travel = np.zeros((individuals,), dtype = float)
perch = np.zeros((individuals,), dtype = float)
p_interact = np.repeat(-2, individuals) # aqui esse array nao e usado, mas ja esta pronto para considerar a ultima planta visitada por cada animal
animals = Animals()
an_sp = animal_sp
mov = np.repeat(Parms.mov_dist, individuals)
time = np.repeat(Parms.daily_time, individuals)
# Animal location
x = env_dim*np.random.random(individuals)
y = env_dim*np.random.random(individuals)
animals.coords = np.append(x, y).reshape(2, individuals).transpose()
# Defining plant species
if Parms.a_abund_field:
names, prop, mat = read_abund(file_name, stage)
order = np.argsort(prop)[::-1]
if Parms.frug:
temp = mat[:,1]/100
temp = temp[order]
if not Parms.mov_dist:
mass = mat[:,0]
mov_sp = inter_mov*np.exp(sl_mov*mass)
mov_sp = mov_sp[order]
names = names[order]
prop = np.sort(prop)[::-1]
an_sp = len(prop)
else:
names = np.arange(1, an_sp+1).astype('S10')
spid = np.arange(1, an_sp+1) # species id
s = 5 # parameter of the lognormal distribution
prop = lognorm.pdf(spid, s, loc=0, scale=1) # proportions come from a discretized log normal distribution, with parameters (mulog = 0, sdlog = 2)
prop = prop/sum(prop) # proportion of individuals of each species
nind = np.rint(prop*individuals).astype(int) # number of individuals of each species
if Parms.a_remove_absent:
names = names[np.where(nind != 0)]
if Parms.frug:
temp = temp[np.where(nind != 0)]
if not Parms.mov_dist:
mov = mov[np.where(nind != 0)]
nind = nind[np.where(nind != 0)]
an_sp = len(nind)
while nind.sum() < individuals:
x = np.random.choice(np.arange(an_sp))
nind[x] = nind[x] + 1
while nind.sum() > individuals:
x = np.random.choice(np.arange(an_sp))
if nind[x] > 1: # I am not removing any species... meybe we have to think about that!
nind[x] = nind[x] - 1
prop = nind.astype(float)/nind.sum() # proportion of individuals of each species
#propacum = prop.cumsum(0) # Cumulative probability for each species
#sp = animal_sp-1
for ind in np.arange(individuals):
#if nind[sp] <= 0:
# sp = sp-1
#animals.sp[ind] = sp+1
#nind[sp] = nind[sp] - 1
animals.seed_n.append([])
animals.seed_t.append([])
i = 0
sp = 0
while sp < an_sp:
if(nind[sp] > 0):
animals.sp[i:(i+nind[sp])] = sp+1
if Parms.frug:
time[i:(i+nind[sp])] *= temp[sp]
if not Parms.mov_dist:
mov[i:(i+nind[sp])] = mov_sp[sp]
i = i+nind[sp]
sp = sp+1
return animals.idd, animals.sp, animals.coords, time, animals.seed_n, animals.seed_t, animals.travel, animals.perch, animals.p_interact, mov, names
def pdf_LN(X, mu, sigma):
''' lognormal pdf with actual miu and sigma
'''
mu_tmp, sigma_tmp = log_params(mu, sigma)
return lognorm.pdf(X, s=sigma_tmp, scale=np.exp(mu_tmp))
pl.figure()
z2s_all_surfaceClasses = []
param_all_surfaceClasses = [[] for _ in range(len(surfaceClasses))]
z2s_all_surfaceClasses = Z2_1cmx1cm_surfaceClasses
x = np.linspace(0.0,0.5,100)
for i in range(len(surfaceClasses)):
pl.hist( Z2_1cmx1cm_surfaceClasses[i] , normed=1, bins=40, range=[0.0,0.5], alpha=.3)
param_all_surfaceClasses[i] = lognorm.fit( z2s_all_surfaceClasses[i] )
#print param_all_surfaceClasses
for i in range(len(surfaceClasses)):
pdf_surfaceClasses = lognorm.pdf(x,param_all_surfaceClasses[i][0],param_all_surfaceClasses[i][1],param_all_surfaceClasses[i][2])
pl.plot(x, pdf_surfaceClasses, c=scColor[i])
pl.xlabel("Z2")
pl.ylabel("Probability Distribution Function")
pl.savefig( str(FIG_FILE_PATH+"Z2_NatVsArt_pdf_hist.eps") )
pl.savefig( str(FIG_FILE_PATH+"Z2_NatVsArt_pdf_hist.pdf") )
pl.show()
exit()
def create_environment(env_dim = 10000, plant_sp = 3, individuals = 1500, dist_corr = 200.0, rho = 0.0, stage = 0,
file_name = ""):
'''
This function populates a continuous landscape of dimension env_dim (m) with "individuals"
plants of "plant_sp" different species. dist_corr and rho sets the autocorralation in the position
of plants.
We still need:
- aggregate species in clusters?
'''
# Plant agents
class Plants:
idd = np.arange(1, individuals+1)
coords = np.array([[], []], dtype = float)
sp = np.zeros((individuals,), dtype=int)
fruits = np.array([], dtype = int)
plants = Plants()
pl_sp = plant_sp
#np.random.seed(3)
# Plant location
x = env_dim*np.random.random(individuals)
y = env_dim*np.random.random(individuals)
plants.coords = np.append(x, y).reshape(2, individuals).transpose()
# Number of fruits
plants.fruits = gamma.rvs(2, scale = 8, size = individuals).astype(int)
np.putmask(plants.fruits, plants.fruits > 100, 100)
# Defining plant species
if Parms.p_abund_field:
names, prop, mat = read_abund(file_name, stage)
order = np.argsort(prop)[::-1]
names = names[order]
prop = np.sort(prop)[::-1]
else:
names = np.arange(1, pl_sp+1).astype('S10')
spid = np.arange(1, pl_sp+1) # species id
s = 2 # parameter of the lognormal distribution
prop = lognorm.pdf(spid, s, loc=0, scale=1) # proportions come from a discretized log normal distribution, with parameters (mulog = 0, sdlog = 2)
prop = prop/sum(prop) # proportion of individuals of each species
nind = np.rint(prop*individuals).astype(int) # number of individuals of each species
# removing sps not present
if Parms.p_remove_absent:
names = names[np.where(nind != 0)]
nind = nind[np.where(nind != 0)]
pl_sp = len(nind)
while nind.sum() < individuals:
x = np.random.choice(np.arange(pl_sp))
nind[x] = nind[x] + 1
while nind.sum() > individuals:
x = np.random.choice(np.arange(pl_sp))
nind[x] = nind[x] - 1
prop = nind.astype(float)/nind.sum() # proportion of individuals of each species
propacum = prop.cumsum(0) # Cumulative probability for each species
# First plant
x = np.where( plants.sp == 0 )[0]
index_ind = np.random.choice(x)
nrand = np.random.uniform()
index_sp = np.amin(np.where( nrand < propacum ))
plants.sp[index_ind] = index_sp+1
# Refreshing
nind[index_sp] = nind[index_sp]-1
prop = nind.astype(float)/nind.sum()
if prop[index_sp] > 0.0:
prop_aux = np.delete(prop, index_sp)
prop_aux = np.array(map(lambda x: x * (1 - rho), prop_aux))
prop_aux = np.insert(prop_aux, index_sp, prop[index_sp] + (1 - prop[index_sp]) * rho)
propacum = prop_aux.cumsum(0)
else:
propacum = prop.cumsum(0)
# Other plants
#while np.any(plants.sp == 0):
while nind.sum() > 0:
dists = np.array(map(distance, np.repeat(plants.coords[index_ind].reshape((1,2)), individuals, axis=0), plants.coords ))
dist_index = np.where( (dists < dist_corr) * (plants.sp == 0) )[0]
if dist_index.size != 0:
index_ind = np.random.choice(dist_index)
else:
#dists_sort = np.sort(dists)
#for i in np.arange(len(dists)):
# indice = np.where( dists_sort[i] == dists )
# if plants.sp[indice] == 0:
# index_ind = indice
# break;
x = np.where( plants.sp == 0 )[0]
index_ind = np.random.choice(x)
nrand = np.random.uniform()
index_sp = np.amin(np.where( nrand < propacum ))
plants.sp[index_ind] = index_sp+1
# Refreshing
nind[index_sp] = nind[index_sp]-1
prop = nind.astype(float)/nind.sum()
print nind.sum()
if prop[index_sp] > 0.0:
prop_aux = np.delete(prop, index_sp)
prop_aux = np.array(map(lambda x: x * (1 - rho), prop_aux))
prop_aux = np.insert(prop_aux, index_sp, prop[index_sp] + (1 - prop[index_sp]) * rho)
propacum = prop_aux.cumsum(0)
else:
propacum = prop.cumsum(0)
return plants.idd, plants.sp, plants.fruits, plants.coords, names
from scipy.stats import lognorm
import math
from scipy.interpolate import UnivariateSpline
import sys
data = sp.genfromtxt(sys.argv[1], delimiter=",")
freq = {}
priceData = data[:, 4]
priceData = priceData[~sp.isnan(priceData)]
shape, loc, scale = lognorm.fit(priceData,loc = 0)
plt.hist(priceData, bins=100, normed=True, alpha=0.6, color='g')
xmin, xmax = plt.xlim()
x = np.linspace(xmin, xmax, 100)
p = lognorm.pdf(x, shape, loc, scale)
print(p)
print(x)
maxIndex = 0
for i in range(0, len(p)):
if p[i] >= p[maxIndex]:
maxIndex = i
else:
break; # if the plot goes down, stop searching.
maxX = x[maxIndex]
plt.plot(x, p, 'k', linewidth=2)
plt.title("Max x = " + str(maxX))
plt.show()
def P(mu,data_obsDict,PrettyHugeDict,lnN_matrix,datacards_dict,processes_dict,stats,**kwargs):
ff=1
I=0
c=0
plus=0
for datacard in PrettyHugeDict.iterkeys():
# ACHTUNG: "for k" and "for processes" have been interchanged...
for k in xrange(0,len(data_obsDict[datacard])):# is there always a process "data_obs" which gives the representative bin number?
if ff < 1e-100:
ff*=1e+100
plus+=1
#print "---------------------------------"
#print k, ff
sk=0
bk=0
for process in PrettyHugeDict[datacard].iterkeys():
bin_k=PrettyHugeDict[datacard][process][stats[datacards_dict[datacard]][processes_dict[datacard][process]]][k]
# get the nominal value:
mu_k=bin_k[1]
# get the statistical sigma:
# are the Ups and Downs symmetric around the nominal value? - First look: yes...
# bei Wln sind die Ups und Downs auf den Bins durcheinandergeworfen! Der Abstand scheint aber wieder zu stimmen --- abs()
sigma_k=abs(bin_k[1]-bin_k[0])
# beim ersten Durchlauf die lnN-priors mit rausholen -> c
scale_factors=1
for scale in lnN_matrix.iterkeys():
# lnN-priors dranmultiplizieren
if c < len(lnN_matrix):
ff*=lognorm.pdf(kwargs[scale],1)
c+=1
# scale_factors generieren
xxx=lnN_matrix[scale][datacards_dict[datacard]][processes_dict[datacard][process]]
if xxx != "-":
scale_factors*=power(kwargs[scale],(float(xxx) - 1.0))
# ------------------------------------------------------------
GBC_sum=0
for syst in PrettyHugeDict[datacard][process]:
if not "stat" in syst:
# GBC(IntVars[syst])
GBC_sum+=(PrettyHugeDict[datacard][process][syst][k][kwargs[syst]] - mu_k)
# sum of the backgrounds (required for the likelihood)
kwarg=kwargs[datacard+"-"+process+"-"+str(k+1)]
if kwarg == "-":
if process != ("ZH" or "WH"):
bk+=scale_factors*(mu_k + GBC_sum)
else:
sk+=scale_factors*(mu_k + GBC_sum)
else: # if kwargs[datacard+"-"+process+"-"+str(k+1)] != "-": --- # if sigma_k > 0.1:
ff*=norm.pdf(kwarg,scale_factors*(mu_k + GBC_sum),sigma_k)
if (norm.pdf(kwarg,scale_factors*(mu_k + GBC_sum),sigma_k) == 0.0):
print datacard, process, k, "GAUSS: ", norm.pdf(kwargs[datacard+"-"+process+"-"+str(k+1)],scale_factors*(mu_k + GBC_sum),sigma_k),kwargs[datacard+"-"+process+"-"+str(k+1)],scale_factors*(mu_k + GBC_sum),sigma_k
if process != ("ZH" or "WH"):
bk+=kwarg
else:
sk+=kwarg
#print process, ff
# ------------------------------------------------------------
#sk und bk verarbeiten
#print "Poisson", data_obsDict[datacard][k],sk,bk, ExtendedPoisson(data_obsDict[datacard][k],mu,sk,bk)
#print "---------------------------------"
ff*=ExtendedPoisson(data_obsDict[datacard][k],mu,sk,bk)
# Jeffreys-Prior vorbereiten
I+=Fisher(mu,sk,bk)
# Jeffreys-Prior
# I kann stellenweise negativ werden - sollte aber keine Rolle spielen, weil der Poissonian dort eh verschwindet...
I=sqrt(abs(I))
# "plus" seems to range from 13 to 17 - take 15 as the default value and compute the relative exponents from there:
#plus=100*(15-plus)
#ff*=10**plus
#print plus, ff
# Feddige Foarmel...
return I*ff
% ( height[range_level], std(reflCompressed), skew(reflCompressed) ) )
#pdb.set_trace()
# Plot histogram of copolar radar reflectivity
plt.subplot(212)
n, bins, patches = plt.hist(reflCompressed,
50, normed=True, histtype='stepfilled')
plt.setp(patches, 'facecolor', 'g', 'alpha', 0.75)
# Overplot best-fit truncated normal
truncNormCurve = plt.plot(reflRange,
norm.pdf(reflRange,loc=mu,scale=sigma)/(1.0-norm.cdf((minRefl-mu)/sigma)),
label="Truncated normal")
# Overplot best-fit normal
normCurve = plt.plot( reflRange,
norm.pdf(reflRange,loc=truncMean,scale=sqrt(truncVarnce)) ,
label="Normal" )
# Overplot best-fit lognormal
plt.plot( reflRange ,
lognorm.pdf( reflRange - minRefl, sqrt(sigma2LogN),
loc=0, scale=expMuLogN ) , label="Lognormal" )
plt.xlabel('Copolar radar reflectivity')
plt.ylabel('Probability')
plt.legend()
#plt.show()
plt.draw()
#plt.close()
#exit
def distfit(n,dists,title,ra,dec,fwhm, dm):
import numpy as np
import matplotlib.pyplot as plt
# from scipy.optimize import curve_fit
from scipy.stats import lognorm
from scipy import ndimage
# n = 279
bins = 165
width = 22
# fwhm = 2.0
sig = ((bins/width)*fwhm)/2.355
valsLP = []
for i in range(25000) :
random_ra = ra*np.random.random_sample((n,))
random_dec = dec*np.random.random_sample((n,))
random_xy = zip(random_ra,random_dec)
grid_r, xedges_r, yedges_r = np.histogram2d(random_dec, random_ra, bins=[bins,bins], range=[[0,width],[0,width]])
hist_points_r = zip(xedges_r,yedges_r)
grid_gaus_r = ndimage.filters.gaussian_filter(grid_r, sig, mode='constant', cval=0)
S_r = np.array(grid_gaus_r*0)
grid_mean_r = np.mean(grid_gaus_r)
grid_sigma_r = np.std(grid_gaus_r)
S_r = (grid_gaus_r-grid_mean_r)/grid_sigma_r
x_cent_r, y_cent_r = np.unravel_index(grid_gaus_r.argmax(),grid_gaus_r.shape)
valsLP.append(S_r[x_cent_r][y_cent_r])
# valsLP = np.loadtxt('valuesLeoP.txt', usecols=(0,), unpack=True)
# vals = np.loadtxt('values.txt', usecols=(0,), unpack=True)
# bins, edges = np.histogram(vals, bins=400, range=[2,22], normed=True)
# centers = (edges[:-1] + edges[1:])/2.
# plt.scatter(centers, bins, edgecolors='none')
x = np.linspace(2, 22, 4000)
# al,loc,beta=lognorm.fit(vals)
# print al, loc, beta
# # plt.plot(x, lognorm.pdf(x, al, loc=loc, scale=beta),'r-', lw=5, alpha=0.6, label='lognormal AGC198606')
# print lognorm.cdf(dists, al, loc=loc, scale=beta)
bins, edges = np.histogram(valsLP, bins=400, range=[2,22], normed=True)
centers = (edges[:-1] + edges[1:])/2.
# x = np.linspace(2, 22, 4000)
# dists = np.array([3.958,3.685,3.897,3.317])
al,loc,beta=lognorm.fit(valsLP)
# print al, loc, beta
plt.plot(x, lognorm.pdf(x, al, loc=loc, scale=beta),'r-', lw=2, alpha=0.6, label='lognormal distribution')
print 'Significance of detection:','{0:6.3f}%'.format(100.0*lognorm.cdf(dists, al, loc=loc, scale=beta))
plt.scatter(centers, bins, edgecolors='none', label='histogram of $\sigma$ from 25000 \nuniform random samples')
# print chisqg(bins, lognorm.pdf(centers, al, loc=loc, scale=beta))
ax = plt.subplot(111)
plt.plot([dists,dists],[-1.0,2.0],'k--', lw=2, alpha=1.0, label='best '+title+' detection')
# plt.plot([4.115,4.115],[-1.0,2.0],'k--', lw=2, alpha=1.0, label='Leo P detection at 1.74 Mpc')
# plt.plot([3.897,3.897],[-1.0,2.0],'k-', lw=5, alpha=0.6, label='d=417 kpc')
# plt.plot([3.317,3.317],[-1.0,2.0],'k-', lw=5, alpha=0.4, label='d=427 kpc')
plt.ylim(0,1.1)
plt.xlim(2,12)
plt.xlabel('$\sigma$ above local mean')
plt.ylabel('$P(\sigma = X)$')
plt.legend(loc='best', frameon=True)
ax.set_aspect(3)
# plt.show()
plt.savefig(title+'_'+repr(dm)+'_'+repr(fwhm)+'_dist.pdf')
def integrand1(z): return lognorm.pdf(z,1)
def generateDistributionPlotValues(self, specification) :
sample_number = 1000
x_values = []
y_values = []
# Generate plot values from selected distribution via PDF
distribution = specification['distribution']
if distribution == 'uniform' :
lower = specification['settings']['lower']
upper = specification['settings']['upper']
base = upper - lower
incr = base/sample_number
for i in range(sample_number) :
x_values.append(lower+i*incr)
y_values = uniform.pdf(x_values, loc=lower, scale=base).tolist()
elif distribution == 'normal' :
mean = specification['settings']['mean']
std_dev = specification['settings']['std_dev']
x_min = mean - 3*std_dev
x_max = mean + 3*std_dev
incr = (x_max - x_min)/sample_number
for i in range(sample_number) :
x_values.append(x_min+i*incr)
y_values = norm.pdf(x_values, loc=mean, scale=std_dev).tolist()
elif distribution == 'triangular' :
a = specification['settings']['a']
base = specification['settings']['b'] - a
c_std = (specification['settings']['c'] - a)/base
incr = base/sample_number
for i in range(sample_number) :
x_values.append(a+i*incr)
y_values = triang.pdf(x_values, c_std, loc=a, scale=base).tolist()
elif distribution == 'lognormal' :
lower = specification['settings']['lower']
scale = specification['settings']['scale']
sigma = specification['settings']['sigma']
x_max = lognorm.isf(0.01, sigma, loc=lower, scale=scale)
incr = (x_max - lower)/sample_number
for i in range(sample_number) :
x_values.append(lower+i*incr)
y_values = lognorm.pdf(x_values, sigma, loc=lower, scale=scale).tolist()
elif distribution == 'beta' :
lower = specification['settings']['lower']
base = specification['settings']['upper'] - lower
incr = base/sample_number
for i in range(sample_number) :
x_values.append(lower+i*incr)
a = specification['settings']['alpha']
b = specification['settings']['beta']
y_values = beta.pdf(x_values, a, b, loc=lower, scale=base).tolist()
# Remove any nan/inf values
remove_indexes = []
for i in range(sample_number) :
if not np.isfinite(y_values[i]) :
remove_indexes.append(i)
for i in range(len(remove_indexes)) :
x_values = np.delete(x_values, i)
y_values = np.delete(y_values, i)
return { 'x_values' : x_values, 'y_values' : y_values }
# ## Recover the HFP histogram
option = namedtuple('option', 'n_bins')
option.n_bins = round(10 * log(t_))
p, x = HistogramFP(pnl.reshape(1, -1), flex_probs, option)
# ## Compute the MMFP pdf
# +
xx = sort(x)
xx = r_[xx, npmax(xx) + arange(0.001, 0.051, 0.001)]
m1 = flex_probs @ pnl.T
m3 = flex_probs @ ((pnl - m1)**3).T
sln = lognorm.pdf(sign(m3) * xx - c, sqrt(sig2), scale=exp(mu)) # fitted pdf
date_dt = array([date_mtop(datenum(i)) for i in date])
myFmt = mdates.DateFormatter('%d-%b-%Y')
date_tick = arange(200 - 1, t_, 820)
# -
# ## Generate the figure
# +
f = figure()
# HFP histogram with MMFP pdf superimposed
h1 = plt.subplot(3, 1, 1)
b = bar(x[:-1],
p[0],
width=x[1] - x[0],
def valsigi(nu):
result = integrate.quad(lambda x: vali(x)*lognorm.pdf(x-log(nu), sig), 1,10)
return result[0]
def _pdf(self, x, mu1, mu2, sigma1, sigma2, lamb):
return lamb * lognorm.pdf(x, s=sigma1, scale=np.exp(mu1)) +\
(1 - lamb) * lognorm.pdf(x, s=sigma2, scale=np.exp(mu2))
def P(mu,data_obsDict,PrettyHugeDict,lnN_matrix,datacards_dict,processes_dict,stats,**kwargs):
ff=0
I=0
c=0
plus=0
for datacard in PrettyHugeDict.iterkeys():
# ACHTUNG: "for k" and "for processes" have been interchanged...
for k in xrange(0,len(data_obsDict[datacard])):# is there always a process "data_obs" which gives the representative bin number?
sk=0
bk=0
for process in PrettyHugeDict[datacard].iterkeys():
bin_k=PrettyHugeDict[datacard][process][stats[datacards_dict[datacard]][processes_dict[datacard][process]]][k]
# get the nominal value:
mu_k=bin_k[1]
# get the statistical sigma:
# are the Ups and Downs symmetric around the nominal value? - First look: yes...
# bei Wln sind die Ups und Downs auf den Bins durcheinandergeworfen! Der Abstand scheint aber wieder zu stimmen --- abs()
sigma_k=abs(bin_k[1]-bin_k[0])
# beim ersten Durchlauf die lnN-priors mit rausholen -> c
scale_factors=1
for scale in lnN_matrix.iterkeys():
# lnN-priors dranmultiplizieren
if c < len(lnN_matrix):
ff+=log(lognorm.pdf(kwargs[scale],1))
if lognorm.pdf(kwargs[scale],1) == 0.0:
print lognorm.pdf(kwargs[scale],1)
c+=1
# scale_factors generieren
xxx=lnN_matrix[scale][datacards_dict[datacard]][processes_dict[datacard][process]]
if xxx != "-":
scale_factors*=power(kwargs[scale],(float(xxx) - 1.0))
# ------------------------------------------------------------
GBC_sum=0
for syst in PrettyHugeDict[datacard][process]:
if not "stat" in syst:
# GBC(IntVars[syst])
GBC_sum+=(PrettyHugeDict[datacard][process][syst][k][kwargs[syst]] - mu_k)
# sum of the backgrounds (required for the likelihood)
kwarg=kwargs[datacard+"-"+process+"-"+str(k+1)]
if kwarg == "-":
if process != ("ZH" or "WH"):
bk+=scale_factors*(mu_k + GBC_sum)
else:
sk+=scale_factors*(mu_k + GBC_sum)
else: # if kwargs[datacard+"-"+process+"-"+str(k+1)] != "-": --- # if sigma_k > 0.1:
ff+=log(norm.pdf(kwarg,scale_factors*(mu_k + GBC_sum),sigma_k))
if process != ("ZH" or "WH"):
bk+=kwarg
else:
sk+=kwarg
# ------------------------------------------------------------
#sk und bk verarbeiten
ff+=log(ExtendedPoisson(data_obsDict[datacard][k],mu,sk,bk))
# Jeffreys-Prior vorbereiten
I+=Fisher(mu,sk,bk)
# Jeffreys-Prior
# I kann stellenweise negativ werden - sollte aber keine Rolle spielen, weil der Poissonian dort eh verschwindet...
I=sqrt(abs(I))
ff+=log(I)
if ff == -float("Inf"):
return 0.0
else:
return exp(ff+4300)
def distance_metric(self,
statistic='all',
verbose=False,
plot_kwargs1={
'color': 'b',
'marker': 'D',
'label': '1'
},
plot_kwargs2={
'color': 'g',
'marker': 'o',
'label': '2'
},
save_name=None):
'''
Calculate the distance.
*NOTE:* The data are standardized before comparing to ensure the
distance is calculated on the same scales.
Parameters
----------
statistic : 'all', 'hellinger', 'ks', 'lognormal'
Which measure of distance to use.
labels : tuple, optional
Sets the labels in the output plot.
verbose : bool, optional
Enables plotting.
plot_kwargs1 : dict, optional
Pass kwargs to `~matplotlib.pyplot.plot` for
`dataset1`.
plot_kwargs2 : dict, optional
Pass kwargs to `~matplotlib.pyplot.plot` for
`dataset2`.
save_name : str,optional
Save the figure when a file name is given.
'''
if statistic is 'all':
self.compute_hellinger_distance()
self.compute_ks_distance()
# self.compute_ad_distance()
if self._do_fit:
self.compute_lognormal_distance()
elif statistic is 'hellinger':
self.compute_hellinger_distance()
elif statistic is 'ks':
self.compute_ks_distance()
elif statistic is 'lognormal':
if not self._do_fit:
raise Exception("Fitting must be enabled to compute the"
" lognormal distance.")
self.compute_lognormal_distance()
# elif statistic is 'ad':
# self.compute_ad_distance()
else:
raise TypeError("statistic must be 'all',"
"'hellinger', 'ks', or 'lognormal'.")
# "'hellinger', 'ks' or 'ad'.")
if verbose:
import matplotlib.pyplot as plt
defaults1 = {'color': 'b', 'marker': 'D', 'label': '1'}
defaults2 = {'color': 'g', 'marker': 'o', 'label': '2'}
for key in defaults1:
if key not in plot_kwargs1:
plot_kwargs1[key] = defaults1[key]
for key in defaults2:
if key not in plot_kwargs2:
plot_kwargs2[key] = defaults2[key]
if self.normalization_type == "standardize":
xlabel = r"z-score"
elif self.normalization_type == "center":
xlabel = r"$I - \bar{I}$"
elif self.normalization_type == "normalize_by_mean":
xlabel = r"$I/\bar{I}$"
else:
xlabel = r"Intensity"
# Print fit summaries if using fitting
if self._do_fit:
try:
print(self.PDF1._mle_fit.summary())
except ValueError:
warn("Covariance calculation failed. Check the fit quality"
" for data set 1!")
try:
print(self.PDF2._mle_fit.summary())
except ValueError:
warn("Covariance calculation failed. Check the fit quality"
" for data set 2!")
# PDF
plt.subplot(121)
plt.semilogy(self.bin_centers,
self.PDF1.pdf,
color=plot_kwargs1['color'],
linestyle='none',
marker=plot_kwargs1['marker'],
label=plot_kwargs1['label'])
plt.semilogy(self.bin_centers,
self.PDF2.pdf,
color=plot_kwargs2['color'],
linestyle='none',
marker=plot_kwargs2['marker'],
label=plot_kwargs2['label'])
if self._do_fit:
# Plot the fitted model.
vals = np.linspace(self.bin_centers[0], self.bin_centers[-1],
1000)
fit_params1 = self.PDF1.model_params
plt.semilogy(vals,
lognorm.pdf(vals,
*fit_params1[:-1],
scale=fit_params1[-1],
loc=0),
color=plot_kwargs1['color'],
linestyle='-')
fit_params2 = self.PDF2.model_params
plt.semilogy(vals,
lognorm.pdf(vals,
*fit_params2[:-1],
scale=fit_params2[-1],
loc=0),
color=plot_kwargs2['color'],
linestyle='-')
plt.grid(True)
plt.xlabel(xlabel)
plt.ylabel("PDF")
plt.legend(frameon=True)
# ECDF
ax2 = plt.subplot(122)
ax2.yaxis.tick_right()
ax2.yaxis.set_label_position("right")
if self.normalization_type is not None:
ax2.plot(self.bin_centers,
self.PDF1.ecdf,
color=plot_kwargs1['color'],
linestyle='-',
marker=plot_kwargs1['marker'],
label=plot_kwargs1['label'])
ax2.plot(self.bin_centers,
self.PDF2.ecdf,
color=plot_kwargs2['color'],
linestyle='-',
marker=plot_kwargs2['marker'],
label=plot_kwargs2['label'])
if self._do_fit:
ax2.plot(
vals,
lognorm.cdf(vals,
*fit_params1[:-1],
scale=fit_params1[-1],
loc=0),
color=plot_kwargs1['color'],
linestyle='-',
)
ax2.plot(
vals,
lognorm.cdf(vals,
*fit_params2[:-1],
scale=fit_params2[-1],
loc=0),
color=plot_kwargs2['color'],
linestyle='-',
)
else:
ax2.semilogx(self.bin_centers,
self.PDF1.ecdf,
color=plot_kwargs1['color'],
linestyle='-',
marker=plot_kwargs1['marker'],
label=plot_kwargs1['label'])
ax2.semilogx(self.bin_centers,
self.PDF2.ecdf,
color=plot_kwargs2['color'],
linestyle='-',
marker=plot_kwargs2['marker'],
label=plot_kwargs2['label'])
if self._do_fit:
ax2.semilogx(
vals,
lognorm.cdf(vals,
*fit_params1[:-1],
scale=fit_params1[-1],
loc=0),
color=plot_kwargs1['color'],
linestyle='-',
)
ax2.semilogx(
vals,
lognorm.cdf(vals,
*fit_params2[:-1],
scale=fit_params2[-1],
loc=0),
color=plot_kwargs2['color'],
linestyle='-',
)
plt.grid(True)
plt.xlabel(xlabel)
plt.ylabel("ECDF")
plt.tight_layout()
if save_name is not None:
plt.savefig(save_name)
plt.close()
else:
plt.show()
return self
plt.xlabel('Distance (m)')
plt.ylim(0, 0.125)
n = 1
lognorm_mean_distance = []
lognorm_var_distance = []
lognorm_skew_distance = []
lognorm_kurt_distance = []
for bins in size_nest_distances:
if len(bins) > 10:
s, loc, scale = lognorm.fit(bins)
mean, var, skew, kurt = lognorm.stats(s, loc, scale, moments='mvsk')
lognorm_mean_distance.append(mean)
lognorm_var_distance.append(var)
lognorm_skew_distance.append(skew)
lognorm_kurt_distance.append(kurt)
pdf = lognorm.pdf(x, s, loc, scale)
plt.plot(x, pdf, label='{}'.format(
n)) #In this plot I am plotting all distributions together
n += 1
plt.legend()
plt.figure(7)
plt.title('Lognormal distributions of distance bins')
plt.ylabel('Sizes (m)')
plt.xlabel('Distance bin (m)')
n = 1
x = np.arange(0, 200, 0.1)
for bins in size_nest_distances:
if len(bins) > 10:
s, loc, scale = lognorm.fit(bins)
pdf = lognorm.pdf(x, s, loc, scale)
def density(self, x):
return lognorm.pdf(x, self.s, loc=self.mu, scale=self.sigma)
def iBSOption(Diff0,Var_lnDiff,K,G,Mu_lnG,Var_lnG):
d1=(log(Diff0/(K-G)))/sqrt(Var_lnDiff)+0.5*sqrt(Var_lnDiff)
d2=d1-sqrt(Var_lnDiff)
OptVal=Diff0*norm.cdf(d1,0.,1.)-(K-G)*norm.cdf(d2,0.,1.)
return OptVal*lognorm.pdf(G,sqrt(Var_lnG),0,exp(Mu_lnG))
def __init__(self,
a,
b,
n,
name,
pa=0.1,
pb=0.9,
lognormal=False,
Plot=True):
mscale.register_scale(ProbitScale)
if Plot:
fig = plt.figure(facecolor="white")
ax1 = fig.add_subplot(121, axisbelow=True)
ax2 = fig.add_subplot(122, axisbelow=True)
ax1.set_xlabel(name)
ax1.set_ylabel("ECDF and Best Fit CDF")
prop = matplotlib.font_manager.FontProperties(size=8)
if lognormal:
sigma = (log(b) - log(a)) / (
(erfinv(2 * pb - 1) - erfinv(2 * pa - 1)) * (2**0.5))
mu = log(a) - erfinv(2 * pa - 1) * sigma * (2**0.5)
cdf = arange(0.001, 1.000, 0.001)
ppf = map(lambda v: lognorm.ppf(v, sigma, scale=exp(mu)), cdf)
x = lognorm.rvs(sigma, scale=exp(mu), size=n)
x.sort()
print "generating lognormal %s, p50 %0.3f, size %s" % (name,
exp(mu), n)
x_s, ecdf_x = ecdf(x)
best_fit = lognorm.cdf(x, sigma, scale=exp(mu))
if Plot:
ax1.set_xscale('log')
ax2.set_xscale('log')
hist_y = lognorm.pdf(x_s, std(log(x)), scale=exp(mu))
else:
sigma = (b - a) / ((erfinv(2 * pb - 1) - erfinv(2 * pa - 1)) *
(2**0.5))
mu = a - erfinv(2 * pa - 1) * sigma * (2**0.5)
cdf = arange(0.001, 1.000, 0.001)
ppf = map(lambda v: norm.ppf(v, mu, scale=sigma), cdf)
print "generating normal %s, p50 %0.3f, size %s" % (name, mu, n)
x = norm.rvs(mu, scale=sigma, size=n)
x.sort()
x_s, ecdf_x = ecdf(x)
best_fit = norm.cdf((x - mean(x)) / std(x))
hist_y = norm.pdf(x_s, loc=mean(x), scale=std(x))
pass
if Plot:
ax1.plot(ppf, cdf, 'r-', linewidth=2)
ax1.set_yscale('probit')
ax1.plot(x_s, ecdf_x, 'o')
ax1.plot(x, best_fit, 'r--', linewidth=2)
n, bins, patches = ax2.hist(x,
normed=1,
facecolor='green',
alpha=0.75)
bincenters = 0.5 * (bins[1:] + bins[:-1])
ax2.plot(x_s, hist_y, 'r--', linewidth=2)
ax2.set_xlabel(name)
ax2.set_ylabel("Histogram and Best Fit PDF")
ax1.grid(b=True,
which='both',
color='black',
linestyle='-',
linewidth=1)
#ax1.grid(b=True, which='major', color='black', linestyle='--')
ax2.grid(True)
return
# @Time : 2020/5/14 22:07 # @Author : gzzang # @File : lognorm # @Project : notebook from scipy.stats import lognorm import matplotlib.pyplot as plt import numpy as np import pdb fig, ax = plt.subplots(1, 1) s = 0.954 s = 0.5 mean, var, skew, kurt = lognorm.stats(s, moments='mvsk') x = np.linspace(lognorm.ppf(0.01, s), lognorm.ppf(0.99, s), 100) ax.plot(x, lognorm.pdf(x, s), 'r-', lw=5, alpha=0.6, label='lognorm pdf') rv = lognorm(s) ax.plot(x, rv.pdf(x), 'k-', lw=2, label='frozen pdf') vals = lognorm.ppf([0.001, 0.5, 0.999], s) print(np.allclose([0.001, 0.5, 0.999], lognorm.cdf(vals, s))) print(np.allclose(a=[1.1000000000001, 1.2], b=[1.1, 1.2])) # pdb.set_trace() r = lognorm.rvs(s, size=1000) sigma = s mu = 0
with open('datafile2.csv') as csvfile2:
reader = csv.reader(csvfile2)
for row in reader:
data2.append(float(row[0]))
# sort the data
data2 = np.sort(data2)
# number for parameters in the distribution for k value for AIC, each one has two parameters need to be estimated
num_params = 2
# Parameter estimates for generic data
shape1, loc1, scale1 = lognorm.fit(data2, floc=0)
mu1 = np.log(scale1)
sigma1 = shape1
y1 = lognorm.pdf(data2, s=sigma1, scale=np.exp(mu1))
log_likelihood1 = np.sum(np.log(y1))
print("Lognorm loglikelihood = " + str(log_likelihood1))
aic1= -2 * log_likelihood1 + 2 * num_params
print("Lognorm AIC = " + str(aic1))
# https://stackoverflow.com/questions/33070724/determine-weibull-parameters-from-data
# Parameter estimates for generic data
shape2, loc2, scale2 = weibull_min.fit(data2, floc=0)
c = shape2
b = scale2
y2 = weibull_min.pdf(data2, c, scale=b)
log_likelihood2 = np.sum(np.log(y2))
print("Weibull loglikelihood = " + str(log_likelihood2))
aic2= -2 * log_likelihood2 + 2 * num_params
print("Weibull AIC = " + str(aic2))
def calc_pdf(density=1e-7,
L_nu=1e50,
sigma=1,
gamma=2.19,
logMu_range=[-10, 6],
N_Mu_bins=200,
z_limits=[0.04, 10.],
nzbins=120,
Lum_limits=[1e45, 1e54],
nLbins=120,
flux_to_mu=10763342917.859608):
"""
Parameter:
- density in 1/Mpc^3
- L_nu in erg/yr
- sigma in dex
- gamma
- flux_to_mu
Integration Parameters
- logMu_range = [-10,6] # expected range in log mu,
- N_Mu_bins = 200 # number of bins for log nu histogram
- z_limits = [0.04, 10.] # Redshift limits
- nzbins = 120 # number of z bins
- Lum_limits = [1e45,1e54] # Luminosity limits
- nLbins = 120 # number of logLuminosity bins
"""
# Conversion Factors
Mpc_to_cm = 3.086e+24
erg_to_GeV = 624.151
year2sec = 365 * 24 * 3600
cosmology = {'omega_M_0': 0.308, 'omega_lambda_0': 0.692, 'h': 0.678}
cosmology = set_omega_k_0(cosmology) # Flat universe
### Define the Redshift and Luminosity Evolution
redshift_evolution = lambda z: HopkinsBeacom2006StarFormationRate(z)
LF = lambda z, logL: redshift_evolution(z)*np.log(10)*10**logL * \
lognorm.pdf(10**logL, np.log(10)*sigma,
scale=L_nu*np.exp(-0.5*(np.log(10)*sigma)**2))
N_tot, int_norm = tot_num_src(redshift_evolution, cosmology, z_limits[-1],
density)
print "Total number of sources {:.0f} (All-Sky)".format(N_tot)
# Setup Arrays
logMu_array = np.linspace(logMu_range[0], logMu_range[1], N_Mu_bins)
Flux_from_fixed_z = []
zs = np.linspace(z_limits[0], z_limits[1], nzbins)
deltaz = (float(z_limits[1]) - float(z_limits[0])) / nzbins
Ls = np.linspace(np.log10(Lum_limits[0]), np.log10(Lum_limits[1]), nLbins)
deltaL = (np.log10(Lum_limits[1]) - np.log10(Lum_limits[0])) / nLbins
# Integration
t0 = time.time()
Count_array = np.zeros(N_Mu_bins)
muError = []
tot_bins = nLbins * nzbins
print('Starting Integration...Going to evaluate {} bins'.format(tot_bins))
N_sum = 0
Flux_from_fixed_z.append([])
print "-" * 20
# Loop over redshift bins
for z_count, z in enumerate(zs):
# Conversion Factor for given z
bz = calc_conversion_factor(z, gamma)
dlz = luminosity_distance(z, **cosmology)
tot_flux_from_z = 0.
# Loop over Luminosity bins
for l_count, lum in enumerate(Ls):
run_id = z_count * nLbins + l_count
if run_id % (tot_bins / 10) == 0.:
print "{}%".format(100 * run_id / tot_bins)
# Number of Sources in
dN = calc_dN(LF, lum, z, deltaL, deltaz, N_tot, int_norm,
cosmology)
N_sum += dN
#Flux to Source Strength
logmu = np.log10(flux_to_mu * erg_to_GeV * 10**lum / year2sec /
(4 * np.pi * (Mpc_to_cm * dlz)**2) * bz)
# Add dN to Histogram
if logmu < logMu_range[1] and logmu > logMu_range[0]:
tot_flux_from_z += dN * 10**logmu
idx = int((logmu - logMu_range[0]) * N_Mu_bins /
(logMu_range[1] - logMu_range[0]))
Count_array[idx] += dN
else:
muError.append(logmu)
Flux_from_fixed_z.append(tot_flux_from_z)
print "Number of Mu out of Range: {}".format(len(muError))
print "Num Sou {}".format(N_sum)
t1 = time.time()
print "-" * 20
print "\n Time needed for {}x{} bins: {}s".format(nzbins, nLbins,
int(t1 - t0))
return logMu_array, Count_array, zs, Flux_from_fixed_z
def log_normal_pdf(x):
'''
Function to calculate PDF of a log-normal distribution
with mu=1.62 and sigma=0.42 at a given x
'''
return lognorm.pdf(x, 0.42, scale=math.exp(1.62))
def PDF(pts, mu, sigma, distribuition, outlier=0, data=0, seed=None):
from scipy.stats import norm, lognorm
import numpy as np
from scipy.interpolate import interp1d
from someFunctions import ash
eps = 5e-5
if distribuition == 'normal':
outlier_inf = outlier_sup = outlier
if not data:
inf, sup = norm.interval(0.9999, loc=mu, scale=sigma)
X1 = np.linspace(inf - outlier, mu, int(1e6))
Y1 = norm.pdf(X1, loc=mu, scale=sigma)
interp = interp1d(Y1, X1)
y1 = np.linspace(Y1[0], Y1[-1], pts // 2 + 1)
x1 = interp(y1)
X2 = np.linspace(mu, sup + outlier, int(1e6))
Y2 = norm.pdf(X2, loc=mu, scale=sigma)
interp = interp1d(Y2, X2)
y2 = np.flip(y1, 0)
x2 = interp(y2)
else:
np.random.set_state(seed)
d = np.random.normal(mu, sigma, data)
inf, sup = min(d) - outlier_inf, max(d) + outlier_sup
#yest,xest = np.histogram(d,bins = 'fd',normed = True)
xest, yest = ash(d)
xest = np.mean(np.array([xest[:-1], xest[1:]]), 0)
M = np.where(yest == max(yest))[0][0]
m = np.where(yest == min(yest))[0][0]
interpL = interp1d(yest[:M + 1],
xest[:M + 1],
assume_sorted=False,
fill_value='extrapolate')
interpH = interp1d(yest[M:],
xest[M:],
assume_sorted=False,
fill_value='extrapolate')
y1 = np.linspace(yest[m] + eps, yest[M], pts // 2 + 1)
x1 = interpL(y1)
y2 = np.flip(y1, 0)
x2 = interpH(y2)
elif distribuition == 'lognormal':
outlier_inf = 0
outlier_sup = outlier
inf, sup = lognorm.interval(0.9999, sigma, loc=0, scale=np.exp(mu))
inf = lognorm.pdf(sup, sigma, loc=0, scale=np.exp(mu))
inf = lognorm.ppf(inf, sigma, loc=0, scale=np.exp(mu))
if not data:
mode = np.exp(mu - sigma**2)
X1 = np.linspace(inf - outlier_inf, mode, int(1e6))
Y1 = lognorm.pdf(X1, sigma, loc=0, scale=np.exp(mu))
interp = interp1d(Y1, X1)
y1 = np.linspace(Y1[0], Y1[-1], pts // 2 + 1)
x1 = interp(y1)
X2 = np.linspace(mode, sup + outlier_sup, int(1e6))
Y2 = lognorm.pdf(X2, sigma, loc=0, scale=np.exp(mu))
interp = interp1d(Y2, X2)
y2 = np.flip(y1, 0)
x2 = interp(y2)
else:
np.random.set_state(seed)
d = np.random.lognormal(mu, sigma, data)
#inf,sup = min(d)-outlier_inf,max(d)+outlier_sup
#yest,xest = np.histogram(d,bins = 'fd',normed = True)
#xest = np.mean(np.array([xest[:-1],xest[1:]]),0)
xest, yest = ash(d)
yest = yest[xest < sup]
xest = xest[xest < sup]
M = np.where(yest == max(yest))[0][0]
m = np.where(yest == min(yest))[0][0]
interpL = interp1d(yest[:M + 1],
xest[:M + 1],
fill_value='extrapolate')
interpH = interp1d(yest[M:], xest[M:])
y1 = np.linspace(yest[m] + eps, yest[M], pts // 2 + 1)
x1 = interpL(y1)
y2 = np.flip(y1, 0)
x2 = interpH(y2)
X = np.concatenate([x1[:-1], x2])
Y = np.concatenate([y1[:-1], y2])
return X, Y
def decide_parameters_and_distribution(disname):
params_lst = []
cont = 1
if disname == "norm":
while True:
m, s = map(float, input("m:平均,s:分散:").split())
params_lst.append([m, s])
cont = int(input("0:終了する.それ以外の数字:続ける"))
if cont == 0:
break
for param in params_lst:
mu = param[0]
s = param[1]
X = np.arange(start=mu - 3 * s, stop=mu + 3 * s, step=0.1)
norm_pdf = norm.pdf(x=X, loc=mu, scale=s)
plt.plot(X, norm_pdf, label="mu={},sigma={}".format(mu, s))
plt.legend()
plt.show()
return
if disname == "expon":
while True:
lam = float(input("lam:平均"))
params_lst.append(lam)
cont = int(input("0:終了する:"))
if cont == 0:
break
for param in params_lst:
lam = param
X = np.arange(start=-1, stop=15, step=0.1)
norm_pdf = expon.pdf(x=X, loc=lam)
plt.plot(X, norm_pdf, label="λ={}".format(lam))
plt.legend()
plt.show()
return
if disname == "gamma":
while True:
k, theta = map(float, input("k:形状,theta:尺度:").split())
params_lst.append([k, theta])
cont = int(input("0:終了する:"))
if cont == 0:
break
for param in params_lst:
k = param[0]
theta = param[1]
X = np.arange(start=-1, stop=k * (theta**2), step=0.1)
norm_pdf = gamma.pdf(x=X, a=k, scale=theta)
plt.plot(X, norm_pdf, label="k={},theta={}".format(k, theta))
plt.legend()
plt.show()
return
if disname == "beta":
while True:
a, b = map(float, input("a:形状母数,b:形状母数:").split())
params_lst.append([a, b])
cont = int(input("0:終了する:"))
if cont == 0:
break
for param in params_lst:
a = param[0]
b = param[1]
X = np.arange(start=0, stop=1, step=0.01)
norm_pdf = beta.pdf(x=X, a=a, b=b)
plt.plot(X, norm_pdf, label="a={},b={}".format(a, b))
plt.legend()
plt.show()
return
if disname == "cauchy":
X = np.arange(start=-2, stop=2, step=0.1)
norm_pdf = cauchy.pdf(x=X, )
plt.plot(X, norm_pdf)
plt.legend()
plt.show()
return
if disname == "log_normal":
while True:
m, s = map(float, input("m:平均,s:分散:").split())
params_lst.append([m, s])
cont = int(input("0:終了する.それ以外の数字:続ける"))
if cont == 0:
break
for param in params_lst:
mu = param[0]
s = param[1]
X = np.arange(start=0, stop=mu + 3 * s, step=0.1)
norm_pdf = lognorm.pdf(x=X, s=mu, scale=s)
plt.plot(X, norm_pdf, label="mu={},sigma={}".format(mu, s))
plt.legend()
plt.show()
return
if disname == "cauchy":
X = np.arange(start=-2, stop=2, step=0.1)
norm_pdf = cauchy.pdf(x=X, )
plt.plot(X, norm_pdf)
plt.legend()
plt.show()
return
if disname == "pareto":
while True:
a, s = map(float, input("a:平均,s:分散:").split())
params_lst.append([a, s])
cont = int(input("0:終了する.それ以外の数字:続ける"))
if cont == 0:
break
for param in params_lst:
mu = param[0]
s = param[1]
X = np.arange(start=0, stop=mu + 3 * s, step=0.1)
norm_pdf = lognorm.pdf(x=X, s=a, scale=s)
plt.plot(X, norm_pdf, label="mu={},sigma={}".format(a, s))
plt.legend()
plt.show()
return
if disname == "wible":
while True:
a, b = map(float, input("a:形状母数,s:経常母数:").split())
params_lst.append([a, b])
cont = int(input("0:終了する.それ以外の数字:続ける"))
if cont == 0:
break
for param in params_lst:
a = param[0]
b = param[1]
X = np.arange(start=0, stop=a + 3 * b, step=0.1)
norm_pdf = lognorm.pdf(x=X, s=a, scale=b)
plt.plot(X, norm_pdf, label="mu={},sigma={}".format(a, b))
plt.legend()
plt.show()
return
def lognorm_pdf(x,mean,std): dist_pdf = lognorm.pdf(x,std,0,mean) return dist_pdf
def pdf(self, x):
return lognorm.pdf(x, 0.3, 0, 2)
def expected(x, i=-1):
return lognorm.pdf(x, 1)
def pdf(self, x):
return lognorm.pdf(x, self.shape, self.loc, self.scale)
def fn_onstatetime_hist(file_name, folder, mean_onstatetime, distribution):
"""
Plots histogram of total number of and fits to lognormal distribution
Inputs: data, filename and foldername which should be defined in the script
"""
import numpy as np
import matplotlib.pyplot as plt
from scipy.stats import lognorm, norm
from pylab import text
n_molecules = len(mean_onstatetime)
#Plot photon flux
figure_name = file_name + '_onstatetime'
ax = plt.subplot(111)
num_bins = np.linspace(int(min(mean_onstatetime)),
int(np.mean(mean_onstatetime)),
int(np.sqrt(len(mean_onstatetime)) * 8))
ax.hist(mean_onstatetime,
bins=num_bins,
density=True,
color='forestgreen',
edgecolor='black')
#Choose distribution
if distribution == 'lognormal':
#Fit lognormal curve
sigma, loc, mean = lognorm.fit(mean_onstatetime, floc=0)
pdf = lognorm.pdf(num_bins, sigma, loc,
mean) #sigma=shape, mu=np.log(scale)
ax.plot(num_bins, pdf, 'k', linestyle='--')
elif distribution == 'normal':
#Fit normal curve
mean, std = norm.fit(mean_onstatetime)
pdf = norm.pdf(num_bins, mean, std) #sigma=shape, mu=np.log(scale)
ax.plot(num_bins, pdf, 'k', linestyle='--')
#Edit plot
plt.xlabel('Mean on-state time (s)', fontname='Arial', fontsize=12)
plt.ylabel('Probability density', fontname='Arial', fontsize=12)
plt.xticks(fontname='Arial', fontsize=12)
plt.yticks(fontname='Arial', fontsize=12)
plt.ticklabel_format(style='sci', axis='y', scilimits=(0, 0))
plt.ticklabel_format(style='sci', axis='x', scilimits=(0, 0))
text(0.75,
0.95,
'μ=' + str(round(mean, 2)) + ' s',
horizontalalignment='center',
verticalalignment='center',
transform=ax.transAxes,
fontname='Arial',
fontsize=12)
text(0.40,
0.95,
'N=' + str(n_molecules),
horizontalalignment='center',
verticalalignment='center',
transform=ax.transAxes,
fontname='Arial',
fontsize=12)
plt.savefig(folder + '/Figures/PDFs' + '/' + figure_name + '.pdf', dpi=500)
plt.savefig(folder + '/Figures/PNGs' + '/' + figure_name + '.png', dpi=500)
return (plt.show())
def __init__(self, a, b, n, name, pa=0.1, pb=0.9, lognormal=False, Plot=True):
mscale.register_scale(ProbitScale)
if Plot:
fig = plt.figure(facecolor="white")
ax1 = fig.add_subplot(121, axisbelow=True)
ax2 = fig.add_subplot(122, axisbelow=True)
ax1.set_xlabel(name)
ax1.set_ylabel("ECDF and Best Fit CDF")
prop = matplotlib.font_manager.FontProperties(size=8)
if lognormal:
sigma = (log(b) - log(a)) / ((erfinv(2 * pb - 1) - erfinv(2 * pa - 1)) * (2 ** 0.5))
mu = log(a) - erfinv(2 * pa - 1) * sigma * (2 ** 0.5)
cdf = arange(0.001, 1.000, 0.001)
ppf = map(lambda v: lognorm.ppf(v, sigma, scale=exp(mu)), cdf)
x = lognorm.rvs(sigma, scale=exp(mu), size=n)
x.sort()
print "generating lognormal %s, p50 %0.3f, size %s" % (name, exp(mu), n)
x_s, ecdf_x = ecdf(x)
best_fit = lognorm.cdf(x, sigma, scale=exp(mu))
if Plot:
ax1.set_xscale("log")
ax2.set_xscale("log")
hist_y = lognorm.pdf(x_s, std(log(x)), scale=exp(mu))
else:
sigma = (b - a) / ((erfinv(2 * pb - 1) - erfinv(2 * pa - 1)) * (2 ** 0.5))
mu = a - erfinv(2 * pa - 1) * sigma * (2 ** 0.5)
cdf = arange(0.001, 1.000, 0.001)
ppf = map(lambda v: norm.ppf(v, mu, scale=sigma), cdf)
print "generating normal %s, p50 %0.3f, size %s" % (name, mu, n)
x = norm.rvs(mu, scale=sigma, size=n)
x.sort()
x_s, ecdf_x = ecdf(x)
best_fit = norm.cdf((x - mean(x)) / std(x))
hist_y = norm.pdf(x_s, loc=mean(x), scale=std(x))
pass
if Plot:
ax1.plot(ppf, cdf, "r-", linewidth=2)
ax1.set_yscale("probit")
ax1.plot(x_s, ecdf_x, "o")
ax1.plot(x, best_fit, "r--", linewidth=2)
n, bins, patches = ax2.hist(x, normed=1, facecolor="green", alpha=0.75)
bincenters = 0.5 * (bins[1:] + bins[:-1])
ax2.plot(x_s, hist_y, "r--", linewidth=2)
ax2.set_xlabel(name)
ax2.set_ylabel("Histogram and Best Fit PDF")
ax1.grid(b=True, which="both", color="black", linestyle="-", linewidth=1)
# ax1.grid(b=True, which='major', color='black', linestyle='--')
ax2.grid(True)
return
flowsdf = pd.read_csv(flows_data_file_path)
flowsdf.columns = ["Detector", "Flow"]
#flowsdf.columns = ["Detector","Flow","Speed"]
#flowsdf = flowsdf[["Detector","Flow"]]
taz_root = get_taz_xml_root(camerasdf) #camerasdf should have closest edge
taz_file_path = norm_path(path_join(origin_path, "wdc.taz.xml"))
with open(taz_file_path, 'w') as f:
f.write(etree.tostring(taz_root, pretty_print=True))
for _u in mu:
for _sig in sigma:
lnpdf = lambda x: lognorm.pdf(x, s=_sig, loc=0, scale=exp(_u))
#b = np.array(get_b_vector_lognorm(flowsdf, distdf, lnpdf, 30)) # we use lognormal results, 30 for 30 minutes
b = np.array(get_b_vector_lognorm(flowsdf, distdf, lnpdf))
for _k in K:
parameter_config_str = str(no_of_cameras) + "cameras_u" + str(_u) + \
"_std" + str(_sig) + "_" + str(_k) + "sp"
kshortest_paths_dump_path = norm_path(
path_join(
origin_path,
str(no_of_cameras) + "_cameras_" + str(_k) +
"_shortest_paths.dump"))
a = get_k_shortest_paths(kshortest_paths_dump_path,
no_of_cameras, _k, G)
from scipy.stats import lognorm
import matplotlib.pyplot as plt
#
# Parâmetros da distribuição
vtMu = [0, 1, 2] # Valores de média da Gaussiana
vtVar = [1, 5, 13] # Valores de variância da Gaussiana
x = np.arange(-20, 20, 0.1)
#
# Variando a média e plotando os gráficos
plt.figure(1, [15, 5])
sigma = np.sqrt(vtVar[0])
for il in range(0, len(vtMu)):
mu = vtMu[il]
plt.subplot(2, 2, 1)
plt.plot(x,
lognorm.pdf(x, s=sigma, scale=np.exp(mu)),
label='Média = {}'.format(mu))
plt.subplot(2, 2, 2)
plt.plot(x,
lognorm.cdf(x, s=sigma, scale=np.exp(mu)),
label='Média = {}'.format(mu))
# Variando a variância e plotando os gráficos
mu = vtMu[0]
for il in range(0, len(vtVar)):
sigma = np.sqrt(vtVar[il])
plt.subplot(2, 2, 3)
plt.plot(x,
lognorm.pdf(x, s=sigma, scale=np.exp(mu)),
label='$\sigma$ = {:01.2f}'.format(sigma))
plt.subplot(2, 2, 4)
plt.plot(x,
def ProcessPrior(Prior, AllObs, DAll, Obs, D, ShowFigs, E, DebugMode):
#%% 1 handle input prior information
#% note that A0min is refined for inclusion in the "jmp" variable at the bottom
allA0min = empty((DAll.nR, 1))
for i in range(0, DAll.nR):
if min(AllObs.dA[i, :]) >= 0:
allA0min[i, 0] = 1e-3
else:
allA0min[i, 0] = -min(AllObs.dA[i, :]) + 1e-3
Obs.hmin = Obs.h.min(1)
AllObs.hmin = AllObs.h.min(1)
A0u = ones((DAll.nR, 1)) * 0.27 * (Prior.meanQbar**.39) * 7.2 * (
Prior.meanQbar**0.5) #Moody & Troutman A0
#%% 2 friction coefficient
meanx1 = empty((D.nR, 1))
meanna = empty((D.nR, 1))
for r in range(0, DAll.nR):
if E.nOpt == 3:
meanx1[r] = -0.1
meanna[r] = 0.04
covx1 = 0.25
covna = 0.05
elif E.nOpt == 4:
meanx1[r] = -0.25
covx1 = 1
meanna[r] = 0.04
covna = .05
elif E.nOpt == 5:
covd = 0.3
#Moody and troutman
meanx1[r] = A0u[r] / mean(AllObs.w[r, :]) * covd
covx1 = 0.5
meanna[r] = 0.03
covna = 0.05
#%% 3 initial probability calculations
v = (covna * meanna)**2
[mun, sigman] = logninvstat(meanna, v)
v = (covx1 * meanx1)**2
[mux1, sigmax1] = logninvstat(meanx1, v)
v = (Prior.covQbar * Prior.meanQbar)**2
[muQbar, sigmaQbar] = logninvstat(Prior.meanQbar, v)
#%% chain setup
N = int(1e4)
if DebugMode:
N = int(1e3)
Nburn = int(N * .2)
for r in range(0, D.nR):
if A0u[r] < allA0min[r]:
A0u[r] = allA0min[r] + 1
nau = meanna
x1u = meanx1
z1 = randn(DAll.nR, N)
z2 = randn(DAll.nR, N)
z3 = randn(DAll.nR, N)
u1 = rand(DAll.nR, N)
u2 = rand(DAll.nR, N)
u3 = rand(DAll.nR, N)
na1 = zeros((D.nR, 1))
na2 = zeros((D.nR, 1))
na3 = zeros((D.nR, 1))
thetaAllA0 = empty((DAll.nR, N))
for r in range(0, DAll.nR):
thetaAllA0[r, 0] = A0u[r]
thetana = empty((DAll.nR, N))
for r in range(0, DAll.nR):
thetana[r, 0] = nau[r]
thetax1 = empty((DAll.nR, N))
for r in range(0, DAll.nR):
thetax1[r, 0] = x1u[r]
thetaQ = empty((DAll.nR, N))
f = empty((DAll.nR, N))
jstdA0s = empty((D.nR, N))
jstdnas = empty((D.nR, N))
jstdx1s = empty((D.nR, N))
#%% chain calculations
tic = time.process_time()
for j in range(0, DAll.nR):
# for j in range(0,1):
print("Processing prior for reach", j + 1, "/", D.nR, ".")
A0u = thetaAllA0[j, 0]
nau = thetana[j, 0]
x1u = thetax1[j, 0]
jstdA0 = A0u
jstdna = nau
jstdx1 = 0.1 * x1u
jtarget = 0.5
Au = A0u + AllObs.dA[j, :]
Abaru = median(Au)
if Prior.Geomorph.Use:
pu1A = lognorm.pdf(Abaru, Prior.Geomorph.logA0_sigma, 0,
exp(Prior.Geomorph.logA0_hat))
else:
pu1A = 1
pu1 = 1
pu2 = lognorm.pdf(nau, sigman[j], 0, exp(mun[j]))
if E.nOpt < 5:
pu3 = lognorm.pdf(-x1u, sigmax1[j], 0, exp(mux1[j]))
elif E.nOpt == 5:
pu3 = lognorm.pdf(x1u, sigmax1[j], 0, exp(mux1[j]))
nhatu = calcnhat(AllObs.w[j, :], AllObs.h[j, :], AllObs.hmin[j],
A0u + AllObs.dA[j, :], x1u, nau, E.nOpt)
Qu = mean(1 / nhatu * (Au)**(5 / 3) * AllObs.w[j, :]**(-2 / 3) *
AllObs.S[j, :]**0.5)
fu = lognorm.pdf(Qu, sigmaQbar, 0, exp(muQbar))
for i in range(0, N):
#adaptation
if i < N * 0.2 and i > 0 and i % 100 == 0:
jstdA0 = mean(jstdA0s[j, 0:i - 1]) / jtarget * (na1[j] / i)
jstdna = mean(jstdnas[j, 0:i - 1]) / jtarget * (na2[j] / i)
jstdx1 = mean(jstdx1s[j, 0:i - 1]) / jtarget * (na3[j] / i)
jstdA0s[j, i] = jstdA0 #this part is very messy
jstdnas[j, i] = jstdna
jstdx1s[j, i] = jstdx1
#A0
A0v = A0u + z1[j, i] * jstdA0
Av = A0v + AllObs.dA[j, :]
Abarv = median(Av)
if A0v < allA0min[j]:
pv1 = 0
fv = 0
pv1A = 0
else:
pv1 = 1
Qv = mean(1 / nhatu * (Av)**(5 / 3) *
AllObs.w[j, :]**(-2 / 3) * AllObs.S[j, :]**0.5)
fv = lognorm.pdf(Qv, sigmaQbar, 0, exp(muQbar))
if Prior.Geomorph.Use:
pv1A = lognorm.pdf(Abarv, Prior.Geomorph.logA0_sigma, 0,
exp(Prior.Geomorph.logA0_hat))
else:
pv1A = 1
MetRatio = fv / fu * pv1 / pu1 * pv1A / pu1A
if MetRatio > u1[j, i]:
na1[j] = na1[j] + 1
A0u = A0v
Au = Av
Qu = Qv
fu = fv
pu1 = pv1
pu1A = pv1A
#na
nav = nau + z2[j, i] * jstdna
if nav <= 0:
pv2 = 0
else:
pv2 = lognorm.pdf(nav, sigman[j], 0, exp(mun[j]))
nhatv = calcnhat(AllObs.w[j, :], AllObs.h[j, :], AllObs.hmin[j],
A0u + AllObs.dA[j, :], x1u, nav, E.nOpt)
Qv = mean(1 / nhatv * (Au)**(5 / 3) * AllObs.w[j, :]**(-2 / 3) *
AllObs.S[j, :]**0.5)
fv = lognorm.pdf(Qv, sigmaQbar, 0, exp(muQbar))
MetRatio = fv / fu * pv2 / pu2
if MetRatio > u2[j, i]:
na2[j] = na2[j] + 1
nau = nav
Qu = Qv
fu = fv
pu2 = pv2
#x1
x1v = x1u + z3[j, i] * jstdx1
if E.nOpt < 5:
if x1v >= 0:
pv3 = 0
else:
pv3 = lognorm.pdf(-x1v, sigmax1[j], 0, exp(mux1[j]))
elif E.nOpt == 5:
if x1v < 0:
pv3 = 0
else:
pv3 = lognorm.pdf(x1v, sigmax1[j], 0, exp(mux1[j]))
nhatv = calcnhat(AllObs.w[j, :], AllObs.h[j, :], AllObs.hmin[j],
A0u + AllObs.dA[j, :], x1v, nau, E.nOpt)
Qv = mean(1 / nhatv * (Au)**(5 / 3) * AllObs.w[j, :]**(-2 / 3) *
AllObs.S[j, :]**0.5)
fv = lognorm.pdf(Qv, sigmaQbar, 0, exp(muQbar))
MetRatio = fv / fu * pv3 / pu3
if MetRatio > u3[j, i]:
na3[j] = na3[j] + 1
x1u = x1v
Qu = Qv
fu = fv
pu3 = pv3
thetaAllA0[j, i] = A0u
thetana[j, i] = nau
thetax1[j, i] = x1u
thetaQ[j, i] = Qu
f[j, i] = fu
toc = time.process_time()
print('Prior MCMC Time: %.2fs' % (toc - tic))
#%% 4. Calculating final prior parameters
Prior.meanAllA0 = mean(thetaAllA0[:, Nburn + 1:N], axis=1)
Prior.stdAllA0 = std(thetaAllA0[:, Nburn + 1:N], axis=1)
Prior.meanna = mean(thetana[:, Nburn + 1:N], axis=1)
Prior.stdna = std(thetana[:, Nburn + 1:N], axis=1)
Prior.meanx1 = mean(thetax1[:, Nburn + 1:N], axis=1)
Prior.stdx1 = std(thetax1[:, Nburn + 1:N], axis=1)
#%% 5. calculate minimum values for A0 for the estimation window
#5.1 calculate minimum values for A0 for the estimation window
estA0min = empty((D.nR, 1))
for i in range(0, D.nR):
if min(Obs.dA[i, :]) >= 0:
estA0min[i, :] = 0
else:
estA0min[i, :] = -min(Obs.dA[i, :])
#5.3 shift the "all" A0 into the estimate window
AllObs.A0Shift = AllObs.dA[:, E.iEst[
0]] #different than the Matlab version... should be ok?
#5.4 save the more restrictive limit
Amin = 1
#this is the lowest value that we will let A0+dA take
jmp = Jump()
jmp.A0min = maximum(allA0min.T + AllObs.A0Shift, estA0min.T) + Amin
jmp.nmin = 0.001
#5.5 set up prior A0 variable by shifting into estimation window
Prior.meanA0 = Prior.meanAllA0 + AllObs.A0Shift
Prior.stdA0 = Prior.stdAllA0
return Prior, jmp
target_seq = []
i= 0
id_list = list(record_dict.keys())
seq_num = len(id_list)
while read_length_count <= target_read_length:
print read_length_count
if i == seq_num:
i = 0
record_id = id_list[i]
record = record_dict[record_id]
rand = random.random()
if (not(read_dict[record.id])):
#print "haha"
print record.id
dist_value = lognorm.pdf(len(record.seq), sigma, loc, scale)
if 0<=rand<= ratio*dist_value/background:
# print ratio*dist_value/background
target_seq.append(record)
read_dict[record.id] = True
read_length_count += len(record.seq)
i += 1
SeqIO.write(target_seq, "D:/Data/20161229/target.fastq", "fastq")
"""
x_fit = np.linspace(data.min(),data.max(),100)
pdf_fitted = lognorm.pdf(x_fit, sigma, loc, scale)
sigma = 0.03
T = 10
fig, ax = plt.subplots()
n, bins, patches = ax.hist(rand_nums[:, 0], bins=num_bins, density=True)
ax.plot(bins, norm.pdf(bins), '-')
fig.suptitle('Standard normal distribution for t=0')
#%%
# The distibution of the account value at ``t=120`` follows a log normal distribution.
# In the expression below, :math:`S_{T}` and :math:`S_{0}` denote the account value
# at ``t=T=120`` and ``t=0`` respectively.
#
# .. math::
#
# \ln\frac{S_{T}}{S_{0}}\sim\phi\left[\left(r-\frac{\sigma^{2}}{2}\right)T, \sigma\sqrt{T}\right]
#
# The graph shows how well the distribution of :math:`e^{-rT}S_{T}`, the present
# values of the account value at `t=0`, fits the PDF of a log normal ditribution.
#
# Reference: *Options, Futures, and Other Derivatives* by John C.Hull
#
# .. seealso::
#
# * :doc:`/libraries/notebooks/savings/savings_example1` notebook in the :mod:`~savings` library
fig, ax = plt.subplots()
n, bins, patches = ax.hist(pv_avs, bins=num_bins, density=True)
ax.plot(bins, lognorm.pdf(bins, sigma * T**0.5, scale=S0), '-')
fig.suptitle('PV of account value at t=120')
logmu = math.log( ( mu**2) / math.sqrt( var + mu**2 ) ) # location parameter of annual peak flow
logsigma = math.sqrt( math.log( var / ( mu**2 ) + 1 ) ) # scale parameter of annual peak flow
expmu = math.exp(logmu)
print mu, var, sd, logmu, logsigma, expmu
# Converting the location parameter logmu and the scale parameter logsigma of a lognormal distribution to mean and variance
#logmu = 4.45142783611 # the bigger the lower peak probability and longer tail
#logsigma = 0.554513029376 # the bigger the lower peak probability and longer tail
#expmu = math.exp(logmu)
#mu = math.exp(logmu + logsigma**2/2)
#var = (math.exp(logsigma**2) - 1) * math.exp(2*logmu + logsigma**2)
#sd = math.sqrt(var)
#print mu, var, sd, logmu, logsigma
plt.plot(inteq, lognorm.pdf(inteq, logsigma, loc = logmu, scale = expmu), lw=6, ls = 'solid', color = 'blue', alpha=0.6, label='Climate Scenario A1')
plt.axis([QCMIN, QCMAX, 0.0, 0.01])
plt.xlabel('Annual Flood Flow (m^3/s)')
plt.ylabel('Probability')
#plt.title('Lognormal Distribution of Annual Flood Flow')
#plt.axis('off') # turns off the axis lines and labels.
#http://matplotlib.org/api/pyplot_api.html
#linewidth or lw float value in points
#linestyle or ls ['solid' | 'dashed', 'dashdot', 'dotted' | (offset, on-off-dash-seq) | '-' | '--' | '-.' | ':' | 'None' | ' ' | '']
# If log(x) is normally distributed with mean logmu and variance logsigma**2,
# then x is log-normally distributed with shape parameter logsigma and scale parameter exp(logmu).
pyplot.plot(x, norm.pdf(x), 'k-') pyplot.show() # 可以通过 loc 和 scale 来调整这些参数，一种方法是调用相关函数时进行输入： x = linspace(-3, 3, 50) p = pyplot.plot(x, norm.pdf(x, loc=0, scale=1)) p = pyplot.plot(x, norm.pdf(x, loc=0.5, scale=2)) p = pyplot.plot(x, norm.pdf(x, loc=-0.5, scale=.5)) pyplot.show() # 不同参数的对数正态分布： from scipy.stats import lognorm x = linspace(0.01, 3, 100) pyplot.plot(x, lognorm.pdf(x, 1), label='s=1') pyplot.plot(x, lognorm.pdf(x, 2), label='s=2') pyplot.plot(x, lognorm.pdf(x, .1), label='s=0.1') pyplot.legend() pyplot.show() # 离散分布 from scipy.stats import randint # 离散均匀分布的概率质量函数（PMF）： high = 10 low = -10 x = arange(low, high + 1, 0.5) p = pyplot.stem(x, randint(low, high).pmf(x)) # 杆状图
ax[0].set_title('Histogram of Pickups - Normal Scale')
# create a vector to hold num of pickups
v = dftaxi.num_pickups
# plot the histogram with 30 bins
v[~((v - v.median()).abs() > 3 * v.std())].hist(bins=30, ax=ax[1])
ax[1].set_xlabel('Num of pickups')
ax[1].set_ylabel('Count')
ax[1].set_title('Histogram of Num of pickups - Scaled')
# apply a lognormal fit. Use the mean of trip distance as the scale parameter
scatter, loc, mean = lognorm.fit(dftaxi.num_pickups.values,
scale=dftaxi.num_pickups.mean(),
loc=0)
pdf_fitted = lognorm.pdf(np.arange(0, 12, .1), scatter, loc, mean)
ax[1].plot(np.arange(0, 12, .1), 600000 * pdf_fitted, 'r')
ax[1].legend(['data', 'lognormal fit'])
plt.show()
#Pickup density
pickup_xaxis = dftaxi.long
pickup_yaxis = dftaxi.lat
sns.set_style('white')
fig, ax = plt.subplots(figsize=(11, 12))
ax.set_axis_bgcolor('black')
ax.scatter(pickup_xaxis, pickup_yaxis, s=7, color='lightpink', alpha=0.7)
ax.set_xlim([-74.03, -73.90])
ax.set_ylim([40.63, 40.85])
ax.set_xlabel("Longitude", fontsize=12)
rnd_a += np.random.normal(0,noise_size,1000) rnd_b += np.random.normal(0,noise_size,1000) rnd_L += np.random.normal(0,noise_size,1000) cntr_a = a_pchip(cmpos) cntr_b = b_pchip(cmpos) cntr_L = L_pchip(cmpos) delta_a = cntr_a - rnd_a delta_b = cntr_b - rnd_b delta_L = cntr_L - rnd_L delta_E = sqrt(square(delta_a) +square(delta_b) + square(delta_L)) # plot them green rndplt=ax.scatter3D(rnd_a,rnd_b,rnd_L,marker='*',c='green',s=50,linewidth=1) # histogramm delta E plt.figure() n, bins, patches = plt.hist(delta_E,bins=50,color='blue',normed=True,histtype='bar') lnrm_shape, lnrm_loc, lnrm_scale = lognorm.fit(delta_E) x= np.linspace(0, delta_E.max(), num=400) y = lognorm.pdf(x,lnrm_shape,loc=lnrm_loc,scale=lnrm_scale) pdflne=plt.plot(x,y,'r--',linewidth=2)
def PDFm(data,
nPoint,
dist='normal',
mu=0,
sigma=1,
analitica=False,
lim=None):
import numpy as np
from scipy.interpolate import interp1d
from scipy.stats import norm, lognorm
eps = 5e-5
if not analitica:
yest, xest = np.histogram(data, bins='fd', density=True)
xest = np.mean(np.array([xest[:-1], xest[1:]]), 0)
M = np.where(yest == max(yest))[0][0]
m = np.where(yest == min(yest))[0][0]
if M:
interpL = interp1d(yest[:M + 1],
xest[:M + 1],
fill_value='extrapolate')
interpH = interp1d(yest[M:], xest[M:])
y1 = np.linspace(yest[m] + eps, yest[M], nPoint // 2 + 1)
x1 = interpL(y1)
y2 = np.flip(y1, 0)
x2 = interpH(y2)
x = np.concatenate([x1[:-1], x2])
y = np.concatenate([y1[:-1], y2])
else:
interp = interp1d(yest, xest, fill_value='extrapolate')
if not nPoint % 2:
nPoint = nPoint + 1
y = np.linspace(yest[M], yest[m], nPoint)
x = interp(y)
else:
inf, sup = lim[0], lim[1]
if dist == 'normal':
#inf, sup = norm.interval(0.9999, loc = mu, scale = sigma)
X1 = np.linspace(inf, mu, int(1e6))
Y1 = norm.pdf(X1, loc=mu, scale=sigma)
interp = interp1d(Y1, X1)
y1 = np.linspace(Y1[0], Y1[-1], nPoint // 2 + 1)
x1 = interp(y1)
X2 = np.linspace(mu, sup, int(1e6))
Y2 = norm.pdf(X2, loc=mu, scale=sigma)
interp = interp1d(Y2, X2)
y2 = np.linspace(Y2[0], Y2[-1], nPoint // 2 + 1)
#y2 = np.flip(y1,0)
x2 = interp(y2)
elif dist == 'lognormal':
mode = np.exp(mu - sigma**2)
X1 = np.linspace(inf, mode, int(1e6))
Y1 = lognorm.pdf(X1, sigma, loc=0, scale=np.exp(mu))
interp = interp1d(Y1, X1)
y1 = np.linspace(Y1[0], Y1[-1], nPoint // 2 + 1)
x1 = interp(y1)
X2 = np.linspace(mode, sup, int(1e6))
Y2 = lognorm.pdf(X2, sigma, loc=0, scale=np.exp(mu))
interp = interp1d(Y2, X2)
y2 = np.linspace(Y2[0], Y2[-1], nPoint // 2 + 1)
#y2 = np.flip(y1,0)
x2 = interp(y2)
x = np.concatenate([x1[:-1], x2])
return x
def distance_metric(self, statistic='all', verbose=False,
plot_kwargs1={'color': 'b', 'marker': 'D',
'label': '1'},
plot_kwargs2={'color': 'g', 'marker': 'o',
'label': '2'},
save_name=None):
'''
Calculate the distance.
*NOTE:* The data are standardized before comparing to ensure the
distance is calculated on the same scales.
Parameters
----------
statistic : 'all', 'hellinger', 'ks', 'lognormal'
Which measure of distance to use.
labels : tuple, optional
Sets the labels in the output plot.
verbose : bool, optional
Enables plotting.
plot_kwargs1 : dict, optional
Pass kwargs to `~matplotlib.pyplot.plot` for
`dataset1`.
plot_kwargs2 : dict, optional
Pass kwargs to `~matplotlib.pyplot.plot` for
`dataset2`.
save_name : str,optional
Save the figure when a file name is given.
'''
if statistic is 'all':
self.compute_hellinger_distance()
self.compute_ks_distance()
# self.compute_ad_distance()
if self._do_fit:
self.compute_lognormal_distance()
elif statistic is 'hellinger':
self.compute_hellinger_distance()
elif statistic is 'ks':
self.compute_ks_distance()
elif statistic is 'lognormal':
if not self._do_fit:
raise Exception("Fitting must be enabled to compute the"
" lognormal distance.")
self.compute_lognormal_distance()
# elif statistic is 'ad':
# self.compute_ad_distance()
else:
raise TypeError("statistic must be 'all',"
"'hellinger', 'ks', or 'lognormal'.")
# "'hellinger', 'ks' or 'ad'.")
if verbose:
import matplotlib.pyplot as plt
defaults1 = {'color': 'b', 'marker': 'D', 'label': '1'}
defaults2 = {'color': 'g', 'marker': 'o', 'label': '2'}
for key in defaults1:
if key not in plot_kwargs1:
plot_kwargs1[key] = defaults1[key]
for key in defaults2:
if key not in plot_kwargs2:
plot_kwargs2[key] = defaults2[key]
if self.normalization_type == "standardize":
xlabel = r"z-score"
elif self.normalization_type == "center":
xlabel = r"$I - \bar{I}$"
elif self.normalization_type == "normalize_by_mean":
xlabel = r"$I/\bar{I}$"
else:
xlabel = r"Intensity"
# Print fit summaries if using fitting
if self._do_fit:
try:
print(self.PDF1._mle_fit.summary())
except ValueError:
warn("Covariance calculation failed. Check the fit quality"
" for data set 1!")
try:
print(self.PDF2._mle_fit.summary())
except ValueError:
warn("Covariance calculation failed. Check the fit quality"
" for data set 2!")
# PDF
plt.subplot(121)
plt.semilogy(self.bin_centers, self.PDF1.pdf,
color=plot_kwargs1['color'], linestyle='none',
marker=plot_kwargs1['marker'],
label=plot_kwargs1['label'])
plt.semilogy(self.bin_centers, self.PDF2.pdf,
color=plot_kwargs2['color'], linestyle='none',
marker=plot_kwargs2['marker'],
label=plot_kwargs2['label'])
if self._do_fit:
# Plot the fitted model.
vals = np.linspace(self.bin_centers[0], self.bin_centers[-1],
1000)
fit_params1 = self.PDF1.model_params
plt.semilogy(vals,
lognorm.pdf(vals, *fit_params1[:-1],
scale=fit_params1[-1],
loc=0),
color=plot_kwargs1['color'], linestyle='-')
fit_params2 = self.PDF2.model_params
plt.semilogy(vals,
lognorm.pdf(vals, *fit_params2[:-1],
scale=fit_params2[-1],
loc=0),
color=plot_kwargs2['color'], linestyle='-')
plt.grid(True)
plt.xlabel(xlabel)
plt.ylabel("PDF")
plt.legend(frameon=True)
# ECDF
ax2 = plt.subplot(122)
ax2.yaxis.tick_right()
ax2.yaxis.set_label_position("right")
if self.normalization_type is not None:
ax2.plot(self.bin_centers, self.PDF1.ecdf,
color=plot_kwargs1['color'], linestyle='-',
marker=plot_kwargs1['marker'],
label=plot_kwargs1['label'])
ax2.plot(self.bin_centers, self.PDF2.ecdf,
color=plot_kwargs2['color'], linestyle='-',
marker=plot_kwargs2['marker'],
label=plot_kwargs2['label'])
if self._do_fit:
ax2.plot(vals,
lognorm.cdf(vals,
*fit_params1[:-1],
scale=fit_params1[-1],
loc=0),
color=plot_kwargs1['color'], linestyle='-',)
ax2.plot(vals,
lognorm.cdf(vals,
*fit_params2[:-1],
scale=fit_params2[-1],
loc=0),
color=plot_kwargs2['color'], linestyle='-',)
else:
ax2.semilogx(self.bin_centers, self.PDF1.ecdf,
color=plot_kwargs1['color'], linestyle='-',
marker=plot_kwargs1['marker'],
label=plot_kwargs1['label'])
ax2.semilogx(self.bin_centers, self.PDF2.ecdf,
color=plot_kwargs2['color'], linestyle='-',
marker=plot_kwargs2['marker'],
label=plot_kwargs2['label'])
if self._do_fit:
ax2.semilogx(vals,
lognorm.cdf(vals, *fit_params1[:-1],
scale=fit_params1[-1],
loc=0),
color=plot_kwargs1['color'], linestyle='-',)
ax2.semilogx(vals,
lognorm.cdf(vals, *fit_params2[:-1],
scale=fit_params2[-1],
loc=0),
color=plot_kwargs2['color'], linestyle='-',)
plt.grid(True)
plt.xlabel(xlabel)
plt.ylabel("ECDF")
plt.tight_layout()
if save_name is not None:
plt.savefig(save_name)
plt.close()
else:
plt.show()
return self
from scipy.stats import lognorm print(lognorm.pdf(1,0.5**2,0,1))