def test_histogram_output():
rng = np.random.default_rng(0)
X = rng.standard_normal(100)
counts, bins = histogram(X, bins=10)
assert_allclose(counts, [2, 0, 12, 14, 14, 17, 16, 8, 9, 8])
assert_allclose(bins, [
-2.32503077, -1.89228844, -1.4595461, -1.02680377, -0.59406143,
-0.1613191, 0.27142324, 0.70416558, 1.13690791, 1.56965025, 2.00239258
])
counts, bins = histogram(X, bins='scott')
assert_allclose(counts, [2, 14, 27, 25, 16, 16])
assert_allclose(bins, [
-2.32503077, -1.59953424, -0.87403771, -0.14854117, 0.57695536,
1.3024519, 2.02794843
])
counts, bins = histogram(X, bins='freedman')
assert_allclose(counts, [2, 11, 16, 18, 22, 14, 13, 4])
assert_allclose(bins, [
-2.32503077, -1.74087192, -1.15671306, -0.5725542, 0.01160465,
0.59576351, 1.17992237, 1.76408122, 2.34824008
],
rtol=2e-7)
counts, bins = histogram(X, bins='blocks')
assert_allclose(counts, [3, 97])
assert_allclose(bins, [-2.32503077, -1.37136996, 2.00239258])
def test_histogram_output():
rng = np.random.RandomState(0)
X = rng.randn(100)
counts, bins = histogram(X, bins=10)
assert_allclose(counts, [1, 5, 7, 13, 17, 18, 16, 11, 7, 5])
assert_allclose(bins, [
-2.55298982, -2.07071537, -1.58844093, -1.10616648, -0.62389204,
-0.1416176, 0.34065685, 0.82293129, 1.30520574, 1.78748018, 2.26975462
])
counts, bins = histogram(X, bins='scott')
assert_allclose(counts, [2, 13, 23, 34, 16, 10, 2])
assert_allclose(bins, [
-2.55298982, -1.79299405, -1.03299829, -0.27300252, 0.48699324,
1.24698901, 2.00698477, 2.76698054
])
counts, bins = histogram(X, bins='freedman')
assert_allclose(counts, [2, 7, 13, 20, 26, 14, 11, 5, 2])
assert_allclose(bins, [
-2.55298982, -1.95796338, -1.36293694, -0.7679105, -0.17288406,
0.42214237, 1.01716881, 1.61219525, 2.20722169, 2.80224813
])
with pytest.warns(AstropyUserWarning,
match=r'p0 does not seem to accurate'):
counts, bins = histogram(X, bins='blocks')
assert_allclose(counts, [10, 61, 29])
assert_allclose(bins, [-2.55298982, -1.24381059, 0.46422235, 2.26975462])
def fig5(fig):
yLabel5=plt.ylabel('Filtered Data')
#xLabel5=plt.xlabel('Azimut')
ax5=fig.add_subplot(111)
dum5=histogram(filtered_data,bins='blocks')
dum55=histogram(filtered_data,bins='knuth')
dum555=histogram(filtered_data,bins='scott')
dum5555=histogram(filtered_data,bins='freedman')
def pdf(self, bins=10, range=None, weights=None, normed=False, **kwargs):
"""
Computation of the Probability Density function of the signal
Wrapper around histogram function from astropy.stats package.
Parameters
----------
normed :obj: `bool`
If set it compute the PDF of the normalize signal. Default is False
bins : :obj: `int` or `list` or `str` (optional)
If bins is a string, then it must be one of:
- 'blocks' : use bayesian blocks for dynamic bin widths
- 'knuth' : use Knuth's rule to determine bins
- 'scott' : use Scott's rule to determine bins
- 'freedman' : use the Freedman-Diaconis rule to determine bins
range : tuple or None (optional)
the minimum and maximum range for the histogram. If not specified,
it will be (x.min(), x.max())
weights : array_like, optional
Not Implemented
other keyword arguments are described in numpy.histogram().
Returns
-------
hist : array
The values of the histogram. See ``normed`` and ``weights`` for a
description of the possible semantics.
bin_edges : array of dtype float
Return the bin edges ``(length(hist)+1)``.
See Also
--------
numpy.histogram
astropy.stats.histogram
"""
if normed:
hist, bins_e = Astats.histogram(self.signorm,
bins=bins,
range=range,
weights=weights,
**kwargs)
else:
hist, bins_e = Astats.histogram(self.sig,
bins=bins,
range=range,
weights=weights,
**kwargs)
return hist, bins_e
def test_histogram_badargs(N=1000, rseed=0):
rng = np.random.RandomState(rseed)
x = rng.randn(N)
# weights is not supported
for bins in ['scott', 'freedman', 'blocks']:
with pytest.raises(NotImplementedError):
histogram(x, bins, weights=x)
# bad bins arg gives ValueError
with pytest.raises(ValueError):
histogram(x, bins='bad_argument')
def pdf_histogram(self, **kwargs):
"""
Compute histogram over the samples in the distribution.
Parameters
----------
All keyword arguments are passed into `astropy.stats.histogram`. Note
That some of these options may not be valid for some multidimensional
distributions.
Returns
-------
hist : array
The values of the histogram. Trailing dimension is the histogram
dimension.
bin_edges : array of dtype float
Return the bin edges ``(length(hist)+1)``. Trailing dimension is the
bin histogram dimension.
"""
distr = self.distribution
raveled_distr = distr.reshape(distr.size//distr.shape[-1], distr.shape[-1])
nhists = []
bin_edges = []
for d in raveled_distr:
nhist, bin_edge = stats.histogram(d, **kwargs)
nhists.append(nhist)
bin_edges.append(bin_edge)
nhists = np.array(nhists)
nh_shape = self.shape + (nhists.size//self.size,)
bin_edges = np.array(bin_edges)
be_shape = self.shape + (bin_edges.size//self.size,)
return nhists.reshape(nh_shape), bin_edges.reshape(be_shape)
def pdf_histogram(self, **kwargs):
"""
Compute histogram over the samples in the distribution.
Parameters
----------
All keyword arguments are passed into `astropy.stats.histogram`. Note
That some of these options may not be valid for some multidimensional
distributions.
Returns
-------
hist : array
The values of the histogram. Trailing dimension is the histogram
dimension.
bin_edges : array of dtype float
Return the bin edges ``(length(hist)+1)``. Trailing dimension is the
bin histogram dimension.
"""
distr = self.distribution
raveled_distr = distr.reshape(distr.size // distr.shape[-1],
distr.shape[-1])
nhists = []
bin_edges = []
for d in raveled_distr:
nhist, bin_edge = stats.histogram(d, **kwargs)
nhists.append(nhist)
bin_edges.append(bin_edge)
nhists = np.array(nhists)
nh_shape = self.shape + (nhists.size // self.size, )
bin_edges = np.array(bin_edges)
be_shape = self.shape + (bin_edges.size // self.size, )
return nhists.reshape(nh_shape), bin_edges.reshape(be_shape)
def test_histogram(bin_type, N=1000, rseed=0):
rng = np.random.RandomState(rseed)
x = rng.randn(N)
counts, bins = histogram(x, bin_type)
assert (counts.sum() == len(x))
assert (len(counts) == len(bins) - 1)
def coverage_correction(full_fluxes, selected_fluxes):
"""Compute the correction to the coverage at each flux.
Returns an interpolated function."""
from astropy.stats import histogram
from scipy.interpolate import interp1d
# full_binned, bin_vals = histogram(full_fluxes, bins='blocks')
# selected_binned, bin_edges = histogram(selected_fluxes, bins=bin_vals)
bins = np.logspace(np.log10(full_fluxes.min()) * 0.99999999,
np.log10(full_fluxes.max()) * 1.00000001,
num=20)
full_binned, bin_vals = np.histogram(full_fluxes, bins=bins)
selected_binned, bin_edges = histogram(selected_fluxes, bins=bins)
if np.any(selected_binned) == 0:
print(np.sum(selected_binned == 0), 'zeros in coverage correction')
corrections = selected_binned / full_binned
bin_centers = (bin_vals[1:] + bin_vals[:-1]) / 2
# print('corrections', corrections)
return interp1d(bin_centers,
corrections,
fill_value=1,
bounds_error=False,
kind='nearest')
def test_histogram_output_knuth():
rng = np.random.RandomState(0)
X = rng.randn(100)
counts, bins = histogram(X, bins='knuth')
assert_allclose(counts, [1, 6, 9, 14, 21, 22, 12, 8, 7])
assert_allclose(bins, [-2.55298982, -2.01712932, -1.48126883, -0.94540834,
-0.40954784, 0.12631265, 0.66217314, 1.19803364,
1.73389413, 2.26975462])
def compute_hist(self, inp_col='parallax', hist_blocks='knuth'):
"""
Compute Histogram bins and heights
"""
inp_dat = self.cat[inp_col][self.cat[inp_col].mask == False]
bin_heights, bin_borders = histogram(inp_dat, bins=hist_blocks)
bin_center = bin_borders[1:] - np.diff(bin_borders)[0] / 2.
self.hist_x = bin_center
self.hist_y = bin_heights
def test_histogram_output_knuth():
rng = np.random.default_rng(0)
X = rng.standard_normal(100)
counts, bins = histogram(X, bins='knuth')
assert_allclose(counts, [2, 1, 13, 19, 15, 18, 14, 10, 8])
assert_allclose(bins, [
-2.32503077, -1.84420596, -1.36338114, -0.88255632, -0.4017315,
0.07909331, 0.55991813, 1.04074295, 1.52156777, 2.00239258
])
def getHistogramVals(data, meta_type, domain, source="numpy"):
# check this: https://github.com/theodoregoetz/histogram
if meta_type == MetaType.DISCRETE:
# for discrete, we just have to count
breaks = np.array([d for d in domain] + [domain[-1] + 1])
densities, breaks = np.histogram(data, bins=breaks, density=True)
repr_points = domain
return breaks, densities, repr_points
if source == "R":
from rpy2 import robjects
init_rpy()
result = robjects.r["getHistogram"](data)
breaks = np.asarray(result[0])
densities = np.asarray(result[2])
mids = np.asarray(result[3])
return breaks, densities, mids
if source == "kde":
import statsmodels.api as sm
kde = sm.nonparametric.KDEMultivariate(data, var_type="c", bw="cv_ls")
bins = int((domain[1] - domain[0]) / kde.bw)
bins = min(30, bins)
cdf_x = np.linspace(domain[0], domain[1], 2 * bins)
cdf_y = kde.cdf(cdf_x)
breaks = np.interp(np.linspace(0, 1, bins), cdf_y,
cdf_x) # inverse cdf
mids = ((breaks + np.roll(breaks, -1)) / 2.0)[:-1]
densities = kde.pdf(mids)
densities / np.sum(densities)
if len(densities.shape) == 0:
densities = np.array([densities])
return breaks, densities, mids
if source == "numpy":
densities, breaks = np.histogram(data, bins="auto", density=True)
mids = ((breaks + np.roll(breaks, -1)) / 2.0)[:-1]
return breaks, densities, mids
if source == "astropy":
from astropy.stats import histogram
densities, breaks = histogram(data, bins="blocks", density=True)
mids = ((breaks + np.roll(breaks, -1)) / 2.0)[:-1]
return breaks, densities, mids
assert False, "unkown histogram method " + source
def test_histogram(bin_type, N=1000, rseed=0):
rng = np.random.RandomState(rseed)
x = rng.randn(N)
# Warning is emitted for blocks
with warnings.catch_warnings():
warnings.filterwarnings('ignore',
message=r'.*p0 does not seem to accurate.*',
category=AstropyUserWarning)
counts, bins = histogram(x, bin_type)
assert (counts.sum() == len(x))
assert (len(counts) == len(bins) - 1)
def test_hist_autobin(rseed=0):
rng = np.random.RandomState(rseed)
x = rng.randn(100)
# 'knuth' bintype depends on scipy that is optional dependency
if HAS_SCIPY:
bintypes = [
10,
np.arange(-3, 3, 10), 'knuth', 'scott', 'freedman', 'blocks'
]
else:
bintypes = [10, np.arange(-3, 3, 10), 'scott', 'freedman', 'blocks']
for bintype in bintypes:
for range in [None, (-3, 3)]:
n1, bins1 = histogram(x, bintype, range=range)
n2, bins2, patches = hist(x, bintype, range=range)
assert_allclose(n1, n2)
assert_allclose(bins1, bins2)
def hist_normalised(y, ax=None, **kwargs):
#hh, bi = histogram(np.array(p1.members_velocities200[iproj]), bins='scott', density=True)#histtype='stepfilled',alpha=0.2)#, density=True)
hh, bi = histogram(y, bins='scott', density=True)
bin_widths = bi[1:] - bi[:-1]
bin_centers = 0.5 * (bi[:-1] + bi[1:])
hist1b = hh / np.max(hh)
bin_edge = np.append(bin_centers[0] - bin_widths[0], bin_centers)
bin_edge = np.append(bin_edge, bin_centers[-1] + bin_widths[-1])
h1_edge = np.append([0], hist1b)
h1_edge = np.append(h1_edge, [0])
ax.step(bin_edge, h1_edge, where='mid',
color=kwargs.get("color", 0)) #'C'+str(iproj))
ax.bar(bin_centers,
hist1b,
width=bin_widths,
align='center',
color=kwargs.get("color", 0),
alpha=0.5)
#ax.bar(bin_centers, hist1b, width = bin_widths, align = 'center', color='C'+str(iproj), alpha = 0.5)
return hist1b, bin_centers
def __init__(self,group,cont,cond,method='blocks'):
"""
Averages spectra in [frame]group based on cond[ition]
if cond has dtype bool it makes two bins
else it histograms cond usin bayesian blocks finds average spectra per bin
cont[inuum] - continuum level for each row in the framegroup
"""
self.group = group
block = group.frames[0].data
for frm in group.frames[1:]:
block = np.vstack((block,frm.data))
self.block = block
if cond.dtype == np.dtype('bool'):
idx, = np.where(cond)
nidx, = np.where(~cond)
binned = np.mean( block[idx,:],axis=0)
con = np.mean( cont[idx])
self.binned = np.vstack( (binned, np.mean( block[nidx,:],axis=0)) )
self.con = np.vstack( (con , np.mean( cont[nidx])) )
self.bins = np.array([0,0,1])
self.counts = np.array([cond.sum(),~cond.sum()])
else:
if len(cond) != block.shape[0]:
raise IndexError("Length of cond does not match number of rows in framegroup")
counts, bins = ast.histogram(cond,bins=method)
sorting = np.digitize(cond,bins[:-1]) # :-1 to get the correct number of buckets from digitize
binned = np.mean(block[sorting == 1,:],axis=0)
con = np.mean( cont[sorting == 1])
for i in np.unique(sorting)[1:]:
binned = np.vstack( (binned, np.mean(block[sorting == i,:],axis=0) ))
con = np.vstack( (con , np.mean( cont[sorting == i]) ))
self.binned = binned
self.con = con
self.counts = counts
self.bins = bins
self.sorting = sorting
def __bin_by_quant(self,quant,cuts):
if cuts is not None:
cuts, = np.where(cuts.reshape(-1))
else:
cuts = np.ones(len(quant)).astype(bool)
datablock = self.group.frames[0].data[:,self.idx]
contblock = self.group.frames[0].cont.val(self.cent)
for frm in self.group.frames[1:]:
datablock = np.concatenate((datablock,frm.data[:,self.idx]),axis=0)
contblock = np.concatenate((contblock,frm.cont.val(self.cent)),axis=0)
datablock = datablock[cuts,:]
contblock = contblock[cuts]
counts, bins = ast.histogram(quant[cuts],bins='blocks')
sorting = np.digitize(quant[cuts],bins[:-1]) # :-1 to get the correct number of buckets from digitize
binned = np.mean(datablock[sorting == 1,:],axis=0)
con = np.zeros(len(counts)); con[0] = np.mean( contblock[sorting == 1] )
for i in np.unique(sorting)[1:]:
binned = np.vstack( (binned,np.mean(datablock[sorting == i,:],axis=0) ))
con[i-1] = np.mean(contblock[sorting == i])
return binned,con,bins,counts
def pdf(self, bins=10, xrange=None, weights=None, normed=False, **kwargs):
"""
Computation of the Probability Density function of the normalized
increments
Wrapper around histogram function from astropy.stats package.
Parameters
----------
bins : :obj: `int` or `list` or `str` (optional)
If bins is a string, then it must be one of:
- 'blocks' : use bayesian blocks for dynamic bin widths
- 'knuth' : use Knuth's rule to determine bins
- 'scott' : use Scott's rule to determine bins
- 'freedman' : use the Freedman-Diaconis rule to determine bins
xrange : tuple or None (optional)
the minimum and maximum range for the histogram. If not specified,
it will be (x.min(), x.max())
weights : array_like, optional
Not Implemented
**kwargs
keyword accepted by self.pdf() and astropy.stats.histogram
Returns
-------
hist : Float
The values of the histogram. See ``normed`` and ``weights`` for a
description of the possible semantics.
xbin : Float of dtype float
Return the bins center.
err : Float
Error assuming a Poissonian deviation and propagated in a normalized
pdf
See Also
--------
numpy.histogram
astropy.stats.histogram
"""
hist, bins_e = Astats.histogram(self.wtN,
bins=bins,
range=xrange,
weights=weights,
density=True,
**kwargs)
xpdf = (bins_e[1:] + bins_e[:-1]) / 2.
if xrange is None:
xrange = [self.wtN.min(), self.wtN.max()]
err = np.sqrt(hist / (np.count_nonzero(
((self.wtN >= xrange[0]) & (self.wtN <= xrange[1]))) *
(bins_e[1] - bins_e[0])))
return hist, xpdf, err
def pdf(self, x, bins=10, range=None, weights=None, log=False, **kwargs):
"""
Computation of the Probability Density function of the signal
Wrapper around histogram function from astropy.stats package.
Parameters
----------
x : :obj: `ndarray`
Variable for the computation of the probability density
function
bins : :obj: `int` or `list` or `str` (optional)
If bins is a string, then it must be one of:
- 'blocks' : use bayesian blocks for dynamic bin widths
- 'knuth' : use Knuth's rule to determine bins
- 'scott' : use Scott's rule to determine bins
- 'freedman' : use the Freedman-Diaconis rule to determine bins
range : tuple or None (optional)
the minimum and maximum range for the histogram. If not specified,
it will be (x.min(), x.max())
log : :obj: `bool`
Default is False. If True and used with integer bins
compute logarithmically spaced bins
weights : array_like, optional
Not Implemented
other keyword arguments are described in numpy.histogram().
Returns
-------
hist : array
The values of the histogram. See ``normed`` and ``weights`` for a
description of the possible semantics.
bin_edges : array of dtype float
Return the bin edges ``(length(hist)+1)``.
See Also
--------
numpy.histogram
astropy.stats.histogram
"""
if log:
if range is None:
range = [x.min(), x.max()]
if not isinstance(bins, int):
print('Warning log bins only with nbins as int')
print('Assuming 20 bins')
nb = 20
else:
nb = bins
bins = np.logspace(np.log10(range[0]), np.log10(range[1]), nb)
hist, bins_e = Astats.histogram(x,
bins=bins,
range=range,
weights=weights,
**kwargs)
return hist, bins_e
def test_histogram(bin_type, N=1000, rseed=0):
rng = np.random.default_rng(rseed)
x = rng.standard_normal(N)
counts, bins = histogram(x, bin_type)
assert (counts.sum() == len(x))
assert (len(counts) == len(bins) - 1)
def match(dataCm):
"""Performs the Match calculation in Eq. 1 of Breivik & Larson (2018)
Parameters
----------
dataCm : list
List of two cumulative data sets for a single paramter
Returns
-------
match : list
List of matches for each cumulative data set
binwidth : float
Binwidth of histograms used for match computation
"""
# DEFINE A LIST TO HOLD THE BINNED DATA:
histo = [[], []]
histoBinEdges = [[], []]
# COMPUTE THE BINWIDTH FOR THE MOST COMPLETE DATA SET:
# NOTE: THIS WILL BE THE BINWIDTH FOR ALL THE HISTOGRAMS IN THE HISTO LIST
with warnings.catch_warnings():
warnings.filterwarnings(
"ignore", message="divide by zero encountered in double_scalars")
try:
bw, binEdges = astroStats.knuth_bin_width(np.array(dataCm[0]),
return_bins=True)
except Exception:
bw, binEdges = astroStats.scott_bin_width(np.array(dataCm[0]),
return_bins=True)
if bw < 1e-4:
bw = 1e-4
binEdges = np.arange(binEdges[0], binEdges[-1], bw)
# BIN THE DATA:
for i in range(2):
histo[i], histoBinEdges[i] = astroStats.histogram(dataCm[i],
bins=binEdges,
density=True)
# COMPUTE THE MATCH:
nominator = []
denominator1 = []
denominator2 = []
nominatorSum = []
denominator1Sum = []
denominator2Sum = []
histo2 = histo[1]
histo1 = histo[0]
for j in range(len(histo1)):
nominator.append(histo1[j] * histo2[j])
denominator1.append((histo1[j] * histo1[j]))
denominator2.append((histo2[j] * histo2[j]))
nominatorSum.append(np.sum(nominator))
denominator1Sum.append(np.sum(denominator1))
denominator2Sum.append(np.sum(denominator2))
nominatorSum = np.array(nominatorSum)
denominator1Sum = np.array(denominator1Sum)
denominator2Sum = np.array(denominator2Sum)
binwidth = binEdges[1] - binEdges[0]
if binwidth < 1e-7:
match = 1e-9
else:
match = np.log10(1 - nominatorSum /
np.sqrt(denominator1Sum * denominator2Sum))
return match[0], binwidth
#!/usr/bin/env python # -*- coding: utf-8 -*- ''' ''' import numpy as np import matplotlib.pyplot as plt from astropy.stats import histogram mu, sigma = 100, 15 data = mu + sigma * np.random.randn(5000) #weights = data / data.max() hist, bin_edges = histogram(data, bins='blocks') print 'Bin widths:', bin_edges[1:] - bin_edges[:-1] bin_centers = (bin_edges[:-1] + bin_edges[1:]) / 2 plt.plot(bin_centers, hist,'.') plt.show() #if __name__ == '__main__':
#!/usr/bin/env python # -*- coding: utf-8 -*- ''' ''' import numpy as np import matplotlib.pyplot as plt from astropy.stats import histogram mu, sigma = 100, 15 data = mu + sigma * np.random.randn(5000) #weights = data / data.max() hist, bin_edges = histogram(data, bins='blocks') print 'Bin widths:', bin_edges[1:] - bin_edges[:-1] bin_centers = (bin_edges[:-1] + bin_edges[1:]) / 2 plt.plot(bin_centers, hist, '.') plt.show() #if __name__ == '__main__':
def match(dataCm, nRuns):
"""Performs the Match calculation in Eq. 1 of Breivik & Larson (2018)
Parameters
----------
dataCm : list
List of cumulative data for a single paramter
nRuns : int
Length of the list
Returns
-------
match : list
List of matches for each cumulative data set
binwidth : float
Binwidth of histograms used for match computation
"""
# DEFINE A LIST TO HOLD THE BINNED DATA:
histo = [[] for i in range(nRuns)]
histoBinEdges = [[] for i in range(int(nRuns))]
# COMPUTE THE BINWIDTH FOR THE MOST COMPLETE DATA SET:
# NOTE: THIS WILL BE THE BINWIDTH FOR ALL THE HISTOGRAMS IN THE HISTO LIST
mainHisto, binEdges = astroStats.histogram(np.array(dataCm[len(dataCm) -
1]),
bins='scott')
# BIN THE DATA:
for i in range(nRuns):
histo[i], histoBinEdges[i] = astroStats.histogram(dataCm[i],
bins=binEdges,
density=True)
# COMPUTE THE MATCH:
nominator = []
denominator1 = []
denominator2 = []
nominatorSum = []
denominator1Sum = []
denominator2Sum = []
match = np.zeros(nRuns - 1)
for i in range(1, nRuns):
histo2 = histo[i]
histo1 = histo[i - 1]
for j in range(len(histo1)):
nominator.append(histo1[j] * histo2[j])
denominator1.append((histo1[j] * histo1[j]))
denominator2.append((histo2[j] * histo2[j]))
nominatorSum.append(np.sum(nominator))
denominator1Sum.append(np.sum(denominator1))
denominator2Sum.append(np.sum(denominator2))
nominatorSum = np.array(nominatorSum, dtype=np.float128)
denominator1Sum = np.array(denominator1Sum, dtype=np.float128)
denominator2Sum = np.array(denominator2Sum, dtype=np.float128)
for i in range(nRuns - 1):
if binEdges[1] - binEdges[0] < 1e-7:
match[i] = 1.0
else:
match[i] = (nominatorSum[i] /
np.sqrt(denominator1Sum[i] * denominator2Sum[i]))
return match, binEdges[1] - binEdges[0]