def goodFits(bestfitloc='posteriorpdf.fits',
Nfits=12,
Ngood=5000,
cleanup=True,
interactive=True,
showOptical=False):
"""
Read posterior PDF and draw Nfits realizations from the final Ngood models
at random. Plot the model from each realization and compare to the data.
Also plot the residuals obtained after subtracting the model from the data
and compare to the data. By default: Nfits = 12, Ngood=5000.
"""
import modifypdf
import numpy
# read the posterior PDFs
print("Found posterior PDF file: {:s}".format(bestfitloc))
fitresults = fits.getdata(bestfitloc)
fitresults = fitresults[-Ngood:]
fitresults = modifypdf.prune(fitresults)
# get keys
from astropy.table import Table
fitKeys = Table.read(bestfitloc).keys()
# select the random realizations model
Nunprune = len(fitresults)
realids = numpy.floor(numpy.random.uniform(0, Nunprune, Nfits))
for ifit in range(Nfits):
realid = numpy.int(realids[ifit])
fitresult = fitresults[realid]
tag = 'goodfit' + str(realid).zfill(4)
printFitParam(fitresult, fitKeys)
visualutil.plotFit(config,
fitresult,
tag=tag,
showOptical=showOptical,
cleanup=cleanup,
interactive=interactive)
def goodFits(bestfitloc='posteriorpdf.fits', Nfits=12, Ngood=5000,
cleanup=True, interactive=True, showOptical=False):
"""
Read posterior PDF and draw Nfits realizations from the final Ngood models
at random. Plot the model from each realization and compare to the data.
Also plot the residuals obtained after subtracting the model from the data
and compare to the data. By default: Nfits = 12, Ngood=5000.
"""
import modifypdf
import numpy
# read the posterior PDFs
print("Found posterior PDF file: {:s}".format(bestfitloc))
fitresults = fits.getdata(bestfitloc)
fitresults = fitresults[-Ngood:]
fitresults = modifypdf.prune(fitresults)
# get keys
from astropy.table import Table
fitKeys = Table.read(bestfitloc).keys()
# select the random realizations model
Nunprune = len(fitresults)
realids = numpy.floor(numpy.random.uniform(0, Nunprune, Nfits))
for ifit in range(Nfits):
realid = numpy.int(realids[ifit])
fitresult = fitresults[realid]
tag = 'goodfit' + str(realid).zfill(4)
printFitParam(fitresult, fitKeys)
visualutil.plotFit(config, fitresult, tag=tag, showOptical=showOptical,
cleanup=cleanup, interactive=interactive)
def plotPDF(fitresults, tag, limits='', Ngood=5000, axes='auto'):
"""
Plot the PDF of each parameter of the model.
"""
import numpy
import matplotlib.pyplot as plt
from pylab import savefig
from matplotlib import rc
import modifypdf
# plotting parameters
rc(
'font', **{
'family': 'sans-serif',
'sans-serif': ['Arial Narrow'],
'size': '12'
})
# grab the last Ngood fits
fitresults = fitresults[-Ngood:]
#lnprobstring = "prior to pruning <Ln Prob>: {:f}"
#print(lnprobstring.format(fitresults['lnprob'].mean()))
# identify the good fits
fitresultsgood = modifypdf.prune(fitresults)
# determine dimensions of PDF plots
nparams = len(fitresultsgood[0])
ncol = 4
nrow = nparams / ncol + 1
j = 1
plt.figure(figsize=(12.0, 1.5 * nrow))
# set up the plotting window
plt.subplots_adjust(left=0.08,
bottom=0.15,
right=0.95,
top=0.95,
wspace=0.4,
hspace=0.65)
pnames = fitresultsgood.names
counter = 0
for pname in pnames:
# Position of primary lens
frg = fitresultsgood[pname]
rmsval = numpy.std(frg)
if rmsval > 1e-6:
avgval = numpy.mean(frg)
print(pname + ' = ' + str(avgval) + ' +/- ' + str(rmsval))
totalwidth = frg.max() - frg.min()
nbins = totalwidth / rmsval * 5
ax = plt.subplot(nrow, ncol, j)
j += 1
plt.hist(frg, nbins, edgecolor='blue')
plt.ylabel('N')
plt.xlabel(pname)
if axes == 'auto':
start, end = ax.get_xlim()
nticks = 5
stepsize = (end - start) / nticks
ax.xaxis.set_ticks(
numpy.arange(start, end + 0.99 * stepsize, stepsize))
elif axes == 'initial':
oldaxis = plt.axis()
if pname[0:6] == 'lnprob':
xmin = frg.min()
xmax = frg.max()
elif pname[0:2] == 'mu':
xmin = 0
xmax = 30
else:
p_l = limits[0]
p_u = limits[1]
xmin = p_l[counter]
xmax = p_u[counter]
counter += 1
ymin = oldaxis[2]
ymax = oldaxis[3]
plt.axis([xmin, xmax, ymin, ymax])
savefile = tag + 'PDFs.png'
savefig(savefile)
def covariance(bestfitloc='posteriorpdf.fits'):
"""
Plot the covariance matrix for the parameters of the model.
"""
import matplotlib.pyplot as plt
import numpy
from pylab import savefig
import modifypdf
from astropy.table import Table
from matplotlib import rc
# plotting parameters
rc('font', **{
'family': 'sans-serif',
'sans-serif': ['Arial Narrow'],
'size': '6'
})
posteriorpdf = Table.read(bestfitloc)
posteriorpdf = posteriorpdf[-5000:]
# remove columns where the values are not changing
posteriorpdfclean = modifypdf.cleanColumns(posteriorpdf)
posteriorpdfgood = modifypdf.prune(posteriorpdfclean)
headers = posteriorpdf.colnames
ncol = len(headers)
k = 0
xsize = ncol * 2
ysize = ncol * 1.5
fig = plt.figure(figsize=(xsize, ysize))
plt.subplots_adjust(left=0.020,
bottom=0.02,
right=0.99,
top=0.97,
wspace=0.5,
hspace=0.5)
#for i in numpy.arange(ncol):
# ax = plt.subplot(ncol, ncol, i + 1)
# namex = 'mu_aper'
# namey = headers[i]
# datax = mupdfgood[namex]
# datay = posteriorpdfgood[namey]
# if namex == 'lnprob':
# datax = datax.max() - datax
# if namey == 'lnprob':
# datay = datay.max() - datay
# lnprob = posteriorpdfgood['lnprob'].max() - posteriorpdfgood['lnprob']
# plt.hexbin(datax, datay, C = lnprob)
# plt.xlabel(namex)
# plt.ylabel(namey)
for i in numpy.arange(ncol):
for j in numpy.arange(ncol - i - 1) + i + 1:
plotspot = ncol * i + j
ax = plt.subplot(ncol, ncol, plotspot)
namex = headers[i]
namey = headers[j]
#datax = posteriorpdforig[namex]
#datay = posteriorpdforig[namey]
#lnprob = posteriorpdforig['lnprob']
#plt.hexbin(datax, datay, C = lnprob, color='black')
datax = posteriorpdfgood[namex]
datay = posteriorpdfgood[namey]
if namex == 'lnprob':
datax = datax.max() - datax
if namey == 'lnprob':
datay = datay.max() - datay
lnprob = posteriorpdfgood['lnprob'].max(
) - posteriorpdfgood['lnprob']
plt.hexbin(datax, datay, C=lnprob)
plt.xlabel(namex)
plt.ylabel(namey)
print(i, j, plotspot, namex, namey)
k += 1
#plt.suptitle(iau_address, x=0.5, y=0.987, fontsize='xx-large')
savefig('covariance.pdf')
plt.clf()
# extract object name from directory
objname = dataname[itarg]
iauname = dataphot['iauname'][itarg]
goodfit = goodfitdat['intrinsic'][itarg]
#goodfit = goodfitdat['observed'][itarg]
fitdir = anloc + dataname[itarg] + '/' + goodfit + '/'
os.chdir(fitdir)
# ------------------------------------------------------------------------
# Read posterior probability distributions
fitloc = 'posteriorpdf.fits'
fitresults = Table.read(fitloc)
fitresults = fitresults[-5000:]
fitresultsgood = modifypdf.cleanColumns(fitresults)
fitresultsgood = modifypdf.bigScoop(fitresultsgood)
fitresultsgood = modifypdf.prune(fitresultsgood, quiet=True)
nfits = len(fitresultsgood)
configfile = open('config.yaml')
config = yaml.load(configfile)
paramData = setuputil.loadParams(config)
if objname != objname_previous:
radeg_centroid = config['Region0']['RACentroid']
decdeg_centroid = config['Region0']['DecCentroid']
c = SkyCoord(ra=radeg_centroid*u.degree,
dec=decdeg_centroid*u.degree)
fullRA = c.ra.to_string(unit='hour', pad=True, sep=':', precision=3)
fullDec = c.dec.to_string('deg', pad=True, alwayssign=True, sep=':', precision=2)
msg = '${0:9}$ ${1:12}$ ${2:12}$'
msgfmt = msg.format(objname, fullRA, fullDec)
def all(goodfit, update=False, mu_estimate=False):
# Check to see whether we've already loaded the data
if not update:
ffile = 'flux_total_observed.dat'
if os.path.exists(ffile):
ffile = 'flux_total_observed.dat'
flux_total_observed = Table.read(ffile, format='ascii')
ffile = 'flux_indiv_observed.dat'
flux_indiv_observed = Table.read(ffile, format='ascii')
ffile = 'flux_indiv_intrinsic.dat'
flux_indiv_intrinsic = Table.read(ffile, format='ascii')
else:
update = True
if update:
cwd = os.getcwd()
# read in the sample targets
anloc = '../../ModelFits/'
dataphotloc = 'targetlist.dat'
dataphot = Table.read(dataphotloc, format='ascii')
dataname = dataphot['dataname']
ntarg = dataname.size
dataflag = numpy.zeros(ntarg)
for i in range(ntarg):
datanamei = dataname[i]
dataloc = anloc + datanamei + '/' + goodfit
if os.path.exists(dataloc):
dataflag[i] = 1
yesmodel = dataflag == 1
dataphot = dataphot[yesmodel]
dataname = dataphot['dataname']
ntarg = len(dataphot)
dataname_indiv = []
flux_total = []
e_flux_total = []
flux_indiv = []
e_flux_indiv = []
flux_indiv_int = []
e_flux_indiv_int = []
for itarg in range(0, ntarg):
# extract object name from directory
objname = dataname[itarg]
iauname = dataphot['iauname'][itarg]
fitdir = anloc + dataname[itarg] + '/' + goodfit + '/'
os.chdir(fitdir)
# ------------------------------------------------------------------------
# Read posterior probability distributions
fitloc = 'posteriorpdf.fits'
fitresults = Table.read(fitloc)
fitresults = fitresults[-5000:]
fitresultsgood = modifypdf.cleanColumns(fitresults)
fitresultsgood = modifypdf.bigScoop(fitresultsgood)
fitresultsgood = modifypdf.prune(fitresultsgood, quiet=True)
configfile = open('config.yaml')
config = yaml.load(configfile)
paramData = setuputil.loadParams(config)
nregions = paramData['nregions']
flux_target = 0
os.chdir(cwd)
for iregion in range(nregions):
sr = str(iregion)
nsource = paramData['nsource_regions'][iregion]
for isource in range(nsource):
ss = str(isource)
datanamesource = dataname[itarg] + '.Source' + ss
tag1 = 'IntrinsicFlux_Source' + ss + '_Region' + sr
if tag1 not in fitresults.keys():
tag1 = 'Region' + sr + ' Source' + ss + ' IntrinsicFlux'
fluxdist = fitresultsgood[tag1]
tag2 = 'mu_tot.Source' + ss + '.Region' + sr
# get the by-eye magnification estimates
if mu_estimate:
datamu = Table.read('mu_estimate.dat', format='ascii')
muindx = datamu['target'] == datanamesource
muerr = datamu['muerr'][muindx][0]
if muerr == 0.25:
mu_by_eye = datamu['mu'][muindx][0]
else:
mu_by_eye = 1.
else:
mu_by_eye = 1.
flux_indiv_int.append(fluxdist.mean() / mu_by_eye)
e_flux_indiv_int.append(fluxdist.std() / mu_by_eye)
if tag2 in fitresults.keys():
if fitresultsgood[tag2].mean() == 100:
continue
observedflux = fluxdist * fitresultsgood[tag2]
print(datanamesource,
fitresultsgood[tag2].mean(),
fitresultsgood[tag2].std())
else:
observedflux = fluxdist
print(datanamesource, 1.0)
flux_target += observedflux
flux_indiv.append(observedflux.mean())
e_flux_indiv.append(observedflux.std())
dataname_indiv.append(datanamesource)
flux_measure = flux_target.mean()
flux_total.append(flux_measure)
flux_error = flux_target.std()
e_flux_total.append(flux_error)
#import matplotlib.pyplot as plt
#plt.hist(flux_target)
#plt.show()
#import pdb; pdb.set_trace()
#print(objname, flux_measure, ' +/- ', flux_error)
flux_total_observed = {'targets': dataname, 'fnu': flux_total,
'e_fnu': e_flux_total}
t1 = Table(flux_total_observed)
t1.write('flux_total_observed.dat', format='ascii')
flux_indiv_observed = {'targets': dataname_indiv, 'fnu': flux_indiv,
'e_fnu': e_flux_indiv}
t1 = Table(flux_indiv_observed)
t1.write('flux_indiv_observed.dat', format='ascii')
flux_indiv_intrinsic = {'targets': dataname_indiv, 'fnu': flux_indiv_int,
'e_fnu': e_flux_indiv_int}
t1 = Table(flux_indiv_intrinsic)
t1.write('flux_indiv_intrinsic.dat', format='ascii')
#import matplotlib.pyplot as plt
#m1 = 0
#m2 = 1 + int(numpy.array(flux_total + flux_indiv + flux_indiv_int).max())
#binwidth = 2
#bins = numpy.arange(m1, m2 + binwidth, binwidth)
#plt.hist(flux_total, bins = bins, histtype='stepfilled')
#binwidth = 1.8
#bins = numpy.arange(m1, m2 + binwidth, binwidth)
#plt.hist(flux_indiv, bins = bins, alpha=0.5, histtype='stepfilled')
#binwidth = 1.6
#bins = numpy.arange(m1, m2 + binwidth, binwidth)
#plt.hist(flux_indiv_int, bins = bins, alpha=0.2, histtype='stepfilled')
#plt.show()
return flux_total_observed, flux_indiv_observed, flux_indiv_intrinsic
def covariance(bestfitloc='posteriorpdf.fits'):
"""
Plot the covariance matrix for the parameters of the model.
"""
import matplotlib.pyplot as plt
import numpy
from pylab import savefig
import modifypdf
from astropy.table import Table
from matplotlib import rc
# plotting parameters
rc('font',**{'family':'sans-serif', 'sans-serif':['Arial Narrow'],
'size':'6'})
posteriorpdf = Table.read(bestfitloc)
posteriorpdf = posteriorpdf[-5000:]
# remove columns where the values are not changing
posteriorpdfclean = modifypdf.cleanColumns(posteriorpdf)
posteriorpdfgood = modifypdf.prune(posteriorpdfclean)
headers = posteriorpdf.colnames
ncol = len(headers)
k = 0
xsize = ncol * 2
ysize = ncol * 1.5
fig = plt.figure(figsize=(xsize, ysize))
plt.subplots_adjust(left=0.020, bottom=0.02, right=0.99, top=0.97,
wspace=0.5, hspace=0.5)
#for i in numpy.arange(ncol):
# ax = plt.subplot(ncol, ncol, i + 1)
# namex = 'mu_aper'
# namey = headers[i]
# datax = mupdfgood[namex]
# datay = posteriorpdfgood[namey]
# if namex == 'lnprob':
# datax = datax.max() - datax
# if namey == 'lnprob':
# datay = datay.max() - datay
# lnprob = posteriorpdfgood['lnprob'].max() - posteriorpdfgood['lnprob']
# plt.hexbin(datax, datay, C = lnprob)
# plt.xlabel(namex)
# plt.ylabel(namey)
for i in numpy.arange(ncol):
for j in numpy.arange(ncol - i - 1) + i + 1:
plotspot = ncol * i + j
ax = plt.subplot(ncol, ncol, plotspot)
namex = headers[i]
namey = headers[j]
#datax = posteriorpdforig[namex]
#datay = posteriorpdforig[namey]
#lnprob = posteriorpdforig['lnprob']
#plt.hexbin(datax, datay, C = lnprob, color='black')
datax = posteriorpdfgood[namex]
datay = posteriorpdfgood[namey]
if namex == 'lnprob':
datax = datax.max() - datax
if namey == 'lnprob':
datay = datay.max() - datay
lnprob = posteriorpdfgood['lnprob'].max() - posteriorpdfgood['lnprob']
plt.hexbin(datax, datay, C = lnprob)
plt.xlabel(namex)
plt.ylabel(namey)
print(i, j, plotspot, namex, namey)
k += 1
#plt.suptitle(iau_address, x=0.5, y=0.987, fontsize='xx-large')
savefig('covariance.pdf')
plt.clf()
nticks = 5
#deltachi2 = 100
posteriorloc = 'posteriorpdf.hdf5'
# read posterior PDF
print "Reading output from emcee"
fitresults = hdf5.read_table_hdf5(posteriorloc)
fitresults = fitresults[-5000:]
print 'prior to pruning: ', fitresults['lnprob'].mean()
# identify the good fits
fitresultsgood = modifypdf.prune(fitresults)
# determine dimensions of PDF plots
nparams = len(fitresultsgood[0])
ncol = 4
nrow = nparams / ncol + 1
j = 1
fig = mpl.figure(figsize=(8.0, 1.0 * nrow))
# set up the plotting window
mpl.subplots_adjust(left=0.08, bottom=0.1, right=0.95, top=0.95,
wspace=0.4, hspace=0.65)
pnames = fitresultsgood.keys()
def plotPDF(fitresults, tag, limits='', Ngood=5000, axes='auto'):
"""
Plot the PDF of each parameter of the model.
"""
import numpy
import matplotlib.pyplot as plt
from pylab import savefig
from matplotlib import rc
import modifypdf
# plotting parameters
rc('font',**{'family':'sans-serif', 'sans-serif':['Arial Narrow'],
'size':'12'})
# grab the last Ngood fits
fitresults = fitresults[-Ngood:]
#lnprobstring = "prior to pruning <Ln Prob>: {:f}"
#print(lnprobstring.format(fitresults['lnprob'].mean()))
# identify the good fits
fitresultsgood = modifypdf.prune(fitresults)
# determine dimensions of PDF plots
nparams = len(fitresultsgood[0])
ncol = 4
nrow = nparams / ncol + 1
j = 1
plt.figure(figsize=(12.0, 1.5 * nrow))
# set up the plotting window
plt.subplots_adjust(left=0.08, bottom=0.15, right=0.95, top=0.95,
wspace=0.4, hspace=0.65)
pnames = fitresultsgood.names
counter = 0
for pname in pnames:
# Position of primary lens
frg = fitresultsgood[pname]
rmsval = numpy.std(frg)
if rmsval > 1e-6:
avgval = numpy.mean(frg)
print(pname + ' = ' + str(avgval) + ' +/- ' + str(rmsval))
totalwidth = frg.max() - frg.min()
nbins = totalwidth / rmsval * 5
ax = plt.subplot(nrow, ncol, j)
j += 1
plt.hist(frg, nbins, edgecolor='blue')
plt.ylabel('N')
plt.xlabel(pname)
if axes == 'auto':
start, end = ax.get_xlim()
nticks = 5
stepsize = (end - start) / nticks
ax.xaxis.set_ticks(numpy.arange(start, end + 0.99*stepsize,
stepsize))
elif axes == 'initial':
oldaxis = plt.axis()
if pname[0:6] == 'lnprob':
xmin = frg.min()
xmax = frg.max()
elif pname[0:2] == 'mu':
xmin = 0
xmax = 30
else:
p_l = limits[0]
p_u = limits[1]
xmin = p_l[counter]
xmax = p_u[counter]
counter += 1
ymin = oldaxis[2]
ymax = oldaxis[3]
plt.axis([xmin, xmax, ymin, ymax])
savefile = tag + 'PDFs.png'
savefig(savefile)
def plotPDF(fitresults, tag, limits='', Ngood=5000, axes='auto'):
"""
Plot the PDF of each parameter of the model.
Returns
-------
avg_dic: dict
key = names of the model parameters, value = average value from the last Ngood samples
"""
import numpy
import matplotlib.pyplot as plt
from pylab import savefig
from matplotlib import rc
import modifypdf
# plotting parameters
rc('font',**{'family':'sans-serif', 'sans-serif':['Arial Narrow'],
'size':'12'})
# grab the last Ngood fits
fitresults = fitresults[-Ngood:]
#lnprobstring = "prior to pruning <Ln Prob>: {:f}"
#print(lnprobstring.format(fitresults['lnprob'].mean()))
# identify the good fits
fitresultsgood = modifypdf.prune(fitresults)
# determine dimensions of PDF plots
nparams = len(fitresultsgood[0])
ncol = 4
nrow = (nparams/ncol + 1) if nparams % ncol != 0 else nparams/ncol
plt.figure(figsize=(18.0, 2.0 * nrow))
# set up the plotting window
plt.subplots_adjust(left=0.08, bottom=0.15, right=0.95, top=0.95,
wspace=0.4, hspace=0.65)
pnames = fitresultsgood.names
width = 1e-6
# intialize a dictionary w/ keywords = pnames to hold the average value of each paramter in the chain
avg_dic = dict.fromkeys(pnames)
for i, pname in enumerate(pnames):
ax = plt.subplot(nrow, ncol, i+1) # nparams/ncol
frg = fitresultsgood[pname]
rmsval = numpy.std(frg)
if rmsval > width:
avgval = numpy.mean(frg)
print("{:s} = {:.4f} +/- {:.4f}").format(pname, avgval, rmsval)
avg_dic[pname] = avgval
totalwidth = frg.max() - frg.min()
nbins = totalwidth / rmsval * 5
plt.hist(frg, int(nbins), edgecolor='blue')
plt.ylabel('N')
plt.xlabel(pname)
if axes == 'auto':
start, end = ax.get_xlim()
nticks = 5
stepsize = (end - start) / nticks
ax.xaxis.set_ticks(numpy.arange(start, end + 0.99*stepsize,
stepsize))
elif axes == 'initial':
oldaxis = plt.axis()
if pname[0:6] == 'lnprob':
xmin = frg.min()
xmax = frg.max()
elif pname[0:2] == 'mu':
xmin = 0
xmax = 30
else:
p_l = limits[0]
p_u = limits[1]
xmin = p_l[i]
xmax = p_u[i]
ymin = oldaxis[2]
ymax = oldaxis[3]
plt.axis([xmin, xmax, ymin, ymax])
else:
print('*** Distribution narrorwer than {} ***').format(width)
print('*** This is likely a fixed parameter: {}. ***').format(pname)
print('*** Check config.yaml *** ')
savefile = tag + 'PDFs.png'
savefig(savefile)
return avg_dic
"""
import matplotlib.pyplot as plt
from astropy.io.misc import hdf5
import numpy
from pylab import savefig
import modifypdf
# examine each inputs_lens.dat file to determine total number of lenses
posteriorpdfloc = 'posteriorpdf.hdf5'
posteriorpdf = hdf5.read_table_hdf5(posteriorpdfloc)
posteriorpdf = posteriorpdf[-5000:]
posteriorpdfgood = modifypdf.prune(posteriorpdf)
headers = posteriorpdf.colnames()
ncol = len(headers)
k = 0
xsize = ncol * 3
ysize = ncol * 2.5
fig = plt.figure(figsize=(xsize, ysize))
plt.subplots_adjust(left=0.020, bottom=0.02, right=0.99, top=0.97,
wspace=0.5, hspace=0.5)
#for i in numpy.arange(ncol):
# ax = plt.subplot(ncol, ncol, i + 1)
# namex = 'mu_aper'
# namey = headers[i]
# datax = mupdfgood[namex]
cwd = os.getcwd()
anloc = '../../ModelFits/'
dataphotloc = 'targetlist.dat'
dataphot = Table.read(dataphotloc, format='ascii')
dataname = dataphot['dataname']
ntarg = dataname.size
dataflag = numpy.zeros(ntarg)
for itarg in range(0, ntarg):
dirloc = anloc + dataname[itarg] + '/' + fitid
print dirloc
#if dataname[itarg] == 'XMM01':
# continue
os.chdir(dirloc)
burninfiles = glob.glob(burninfile)
burninlast = burninfiles[-1]
fitresults = Table.read(burninlast, format='ascii', data_start=-5000)
prunedpdf = modifypdf.prune(fitresults)
import matplotlib.pyplot as plt
plt.clf()
maxprob = fitresults['lnprob'].max() + 0.1
hist1 = numpy.log10(maxprob - fitresults['lnprob'])
plt.hist(hist1, bins=15, log=True)
hist1 = numpy.log10(maxprob - prunedpdf['lnprob'])
plt.hist(hist1, bins=15, log=True)
plt.title(dataname[itarg])
from pylab import savefig
savefig('prunecheck')
os.chdir(cwd)