def compute(self, psf, stars, logger=None):
"""
:param psf: A PSF Object
:param stars: A list of Star instances.
:param logger: A logger object for logging debug info. [default: None]
"""
import treecorr
# get the shapes
if logger:
logger.warning("Calculating rho statistics for %d stars",len(stars))
positions, shapes_truth, shapes_model = self.measureShapes(psf, stars, logger=logger)
# Only use stars for which hsm was successful
flag_truth = shapes_truth[:, 6]
flag_model = shapes_model[:, 6]
mask = (flag_truth == 0) & (flag_model == 0)
# define terms for the catalogs
u = positions[mask, 0]
v = positions[mask, 1]
T = shapes_truth[mask, 3]
g1 = shapes_truth[mask, 4]
g2 = shapes_truth[mask, 5]
dT = T - shapes_model[mask, 3]
dg1 = g1 - shapes_model[mask, 4]
dg2 = g2 - shapes_model[mask, 5]
# make the treecorr catalogs
if logger:
logger.info("Creating Treecorr Catalogs")
cat_g = treecorr.Catalog(x=u, y=v, x_units='arcsec', y_units='arcsec',
g1=g1, g2=g2)
cat_dg = treecorr.Catalog(x=u, y=v, x_units='arcsec', y_units='arcsec',
g1=dg1, g2=dg2)
cat_gdTT = treecorr.Catalog(x=u, y=v, x_units='arcsec', y_units='arcsec',
g1=g1 * dT / T, g2=g2 * dT / T)
# setup and run the correlations
if logger:
logger.info("Processing rho PSF statistics")
# save the rho objects
self.rho1 = treecorr.GGCorrelation(self.tckwargs)
self.rho1.process(cat_dg)
self.rho2 = treecorr.GGCorrelation(self.tckwargs)
self.rho2.process(cat_g, cat_dg)
self.rho3 = treecorr.GGCorrelation(self.tckwargs)
self.rho3.process(cat_gdTT)
self.rho4 = treecorr.GGCorrelation(self.tckwargs)
self.rho4.process(cat_dg, cat_gdTT)
self.rho5 = treecorr.GGCorrelation(self.tckwargs)
self.rho5.process(cat_g, cat_gdTT)
def get_corr(res, weights):
import treecorr
nbins = config['treecorr_n_bins']
min_sep = config['treecorr_min_sep']
max_sep = config['treecorr_max_sep']
sep_units = 'arcmin'
shape_cat = treecorr.Catalog(g1=res['e1'],
g2=res['e2'],
ra=res['ra'],
dec=res['de'],
ra_units='deg',
dec_units='deg',
w=weights)
gg = treecorr.GGCorrelation(nbins=nbins,
min_sep=min_sep,
max_sep=max_sep,
sep_units=sep_units,
verbose=2)
gg.process(shape_cat)
responsivity_cat = treecorr.Catalog(g1=res['m1'],
g2=res['m2'],
ra=res['ra'],
dec=res['de'],
ra_units='deg',
dec_units='deg',
w=weights)
mm = treecorr.GGCorrelation(nbins=nbins,
min_sep=min_sep,
max_sep=max_sep,
sep_units=sep_units,
verbose=2)
mm.process(responsivity_cat)
if args.use_responsivity == True:
xip = gg.xip / mm.xip * 2. # The real part of xi+
xim = gg.xim / mm.xim * 2. # The real part of xi-
warnings.warn('using responsivity')
else:
xip = gg.xip # The real part of xi+
xim = gg.xim # The real part of xi-
logr = gg.logr # The nominal center of each bin
meanlogr = gg.meanlogr # The mean <log(r)> within the bins
varxi = gg.varxi # The variance of each xi+ or xi- value taking into account shape noise only
stdxi = np.sqrt(varxi)
return logr, xip, xim, stdxi
def run_treecorr(x, y, g1, g2, min_sep, max_sep, nbins):
"""Run treecorr on GalSim shear grid routine"""
assert x.shape == y.shape
assert x.shape == g1.shape
assert x.shape == g2.shape
x_col = pyfits.Column(name='x', format='1D', array=x.flatten())
y_col = pyfits.Column(name='y', format='1D', array=y.flatten())
g1_col = pyfits.Column(name='g1', format='1D', array=g1.flatten())
g2_col = pyfits.Column(name='g2', format='1D', array=g2.flatten())
cols = pyfits.ColDefs([x_col, y_col, g1_col, g2_col])
table = pyfits.new_table(cols)
phdu = pyfits.PrimaryHDU()
hdus = pyfits.HDUList([phdu, table])
hdus.writeto('temp.fits', clobber=True)
# Define the treecorr catalog object.
cat = treecorr.Catalog('temp.fits',
x_units='degrees',
y_units='degrees',
x_col='x',
y_col='y',
g1_col='g1',
g2_col='g2')
gg = treecorr.GGCorrelation(min_sep=min_sep,
max_sep=max_sep,
nbins=nbins,
sep_units='degrees',
bin_slop=0.2)
gg.process(cat)
os.remove('temp.fits')
return {'log_r': gg.logr, 'xipm': np.hstack((gg.xip, gg.xim))}
def calc_shear_shear(self,i,j,verbose,num_threads):
m1,m2,mask = self.get_m(i)
if self.params['has_sheared']:
cat_i = treecorr.Catalog(g1=self.shape['e1'][mask]/m1[mask], g2=self.shape['e2'][mask]/m2[mask], w=self.weight[mask], ra=self.shape['ra'][mask], dec=self.shape['dec'][mask], ra_units='deg', dec_units='deg')
else:
cat_i = treecorr.Catalog(g1=self.shape['e1'][mask], g2=self.shape['e2'][mask], w=self.weight[mask], ra=self.shape['ra'][mask], dec=self.shape['dec'][mask], ra_units='deg', dec_units='deg')
biascat_i = treecorr.Catalog(k=np.sqrt(self.shape['m1'][mask]*self.shape['m2'][mask]), w=self.weight[mask], ra=self.shape['ra'][mask], dec=self.shape['dec'][mask], ra_units='deg', dec_units='deg')
m1,m2,mask = self.get_m(j)
if self.params['has_sheared']:
cat_j = treecorr.Catalog(g1=self.shape['e1'][mask]/m1[mask], g2=self.shape['e2'][mask]/m2[mask], w=self.weight[mask], ra=self.shape['ra'][mask], dec=self.shape['dec'][mask], ra_units='deg', dec_units='deg')
else:
cat_j = treecorr.Catalog(g1=self.shape['e1'][mask], g2=self.shape['e2'][mask], w=self.weight[mask], ra=self.shape['ra'][mask], dec=self.shape['dec'][mask], ra_units='deg', dec_units='deg')
biascat_j = treecorr.Catalog(k=np.sqrt(self.shape['m1'][mask]*self.shape['m2'][mask]), w=self.weight[mask], ra=self.shape['ra'][mask], dec=self.shape['dec'][mask], ra_units='deg', dec_units='deg')
gg = treecorr.GGCorrelation(nbins=self.params['tbins'], min_sep=self.params['tbounds'][0], max_sep=self.params['tbounds'][1], sep_units='arcmin', bin_slop=self.params['slop'], verbose=verbose,num_threads=num_threads)
gg.process(cat_i,cat_j)
if self.params['has_sheared']:
norm = 1.
else:
kk = treecorr.KKCorrelation(nbins=self.params['tbins'], min_sep=self.params['tbounds'][0], max_sep=self.params['tbounds'][1], sep_units='arcmin', bin_slop=self.params['slop'], verbose=verbose,num_threads=num_threads)
kk.process(biascat_i,biascat_j)
norm = kk.xi
theta=np.exp(gg.meanlogr)
xip = gg.xip/norm
xim = gg.xim/norm
xiperr = ximerr = np.sqrt(gg.varxi)/norm
return theta, xip, xim, xiperr, ximerr
def calculate_shear_shear(self, data, i, j):
import treecorr
cat_i = self.get_shear_catalog(data, i)
n_i = cat_i.nobj
if i == j:
cat_j = cat_i
n_j = n_i
else:
cat_j = self.get_shear_catalog(data, j)
n_j = cat_j.nobj
print(
f"Rank {self.rank} calculating shear-shear bin pair ({i},{j}): {n_i} x {n_j} objects"
)
gg = treecorr.GGCorrelation(self.config)
gg.process(cat_i, cat_j)
theta = np.exp(gg.meanlogr)
xip = gg.xip
xim = gg.xim
xiperr = np.sqrt(gg.varxip)
ximerr = np.sqrt(gg.varxim)
return theta, xip, xim, xiperr, ximerr, gg.npairs, gg.weight
def shear_shear_corr(pos1,pos2,shear1,shear2,k1=None,k2=None,w1=None,w2=None,same_zshell=False,same_cell=False,unique_encounter=False,num_threads=0): nbins = 6 min_sep = 0.05 # 3 arcmin max_sep = 3.0 # 180 arcmin bin_size = (max_sep-min_sep)/nbins # roughly bin_slop = 0.05/bin_size # 0.1 -> 0.05 # 2pt_pipeline for des used bin_slop: 0.01 here: https://github.com/des-science/2pt_pipeline/blob/master/pipeline/twopt_pipeline.yaml # num_threads = 5 #None #0 logger = None if same_zshell and same_cell: # auto ra, dec = pos1 # either 1 or 2 works g1, g2 = shear1 k = k1 w = w1 cat = treecorr.Catalog(g1=g1, g2=g2, k=k, ra=ra, dec=dec, w=w, ra_units='degrees', dec_units='degrees') elif same_zshell: # just wanted to distrubute the workload fairly for two encounters (didn't want to make one of the cores idle) ra1, dec1 = np.array_split(pos1[0], 2), np.array_split(pos1[1], 2) # split in half ra2, dec2 = np.array_split(pos2[0], 2), np.array_split(pos2[1], 2) g1_1st, g2_1st = np.array_split(shear1[0], 2), np.array_split(shear1[1], 2) g1_2nd, g2_2nd = np.array_split(shear2[0], 2), np.array_split(shear2[1], 2) k1 = np.array_split(k1, 2) if (k1 is not None) else [None,None] k2 = np.array_split(k2, 2) if (k2 is not None) else [None,None] w1 = np.array_split(w1, 2) if (w1 is not None) else [None,None] w2 = np.array_split(w2, 2) if (w2 is not None) else [None,None] cat1 = [treecorr.Catalog(g1=g1_1st[h], g2=g2_1st[h], k=k1[h], ra=ra1[h], dec=dec1[h], w=w1[h], ra_units='degrees', dec_units='degrees') for h in [0,1]] cat2 = [treecorr.Catalog(g1=g1_2nd[h], g2=g2_2nd[h], k=k2[h], ra=ra2[h], dec=dec2[h], w=w2[h], ra_units='degrees', dec_units='degrees') for h in [0,1]] else: ra1, dec1 = pos1 ra2, dec2 = pos2 g1_1st, g2_1st = shear1 g1_2nd, g2_2nd = shear2 cat1 = treecorr.Catalog(g1=g1_1st, g2=g2_1st, k=k1, ra=ra1, dec=dec1, w=w1, ra_units='degrees', dec_units='degrees') cat2 = treecorr.Catalog(g1=g1_2nd, g2=g2_2nd, k=k2, ra=ra2, dec=dec2, w=w2, ra_units='degrees', dec_units='degrees') gg = treecorr.GGCorrelation(min_sep=min_sep, max_sep=max_sep, nbins=nbins, bin_slop=bin_slop, sep_units='degrees', logger=logger) if same_zshell and same_cell: gg.process_auto(cat,num_threads=num_threads) elif same_zshell: # just wanted to distrubute the workload fairly for two encounters (didn't want to make one of the cores idle) if unique_encounter: # the following two counts shouldn't be doubled up cuz they're the same in both directions gg.process_cross(cat1[0],cat2[0],num_threads=num_threads) gg.process_cross(cat1[1],cat2[1],num_threads=num_threads) else: # in the other encounter cat1 and cat2 are switched but does not matter anyway gg.process_cross(cat2[0],cat1[1],num_threads=num_threads) gg.process_cross(cat2[1],cat1[0],num_threads=num_threads) else: gg.process_cross(cat1,cat2,num_threads=num_threads) if same_zshell and same_cell: varg1 = treecorr.calculateVarG(cat) varg2 = varg1 elif same_cell: varg1 = treecorr.calculateVarG(cat1) varg2 = treecorr.calculateVarG(cat2) else: varg1 = np.nan varg2 = np.nan return gg, varg1, varg2
def run_treecorr(x, y, g1, g2):
"""Helper routine to take outputs of GalSim shear grid routine, and run treecorr on it."""
import pyfits
import os
import treecorr
# Use fits binary table for faster I/O.
assert x.shape == y.shape
assert x.shape == g1.shape
assert x.shape == g2.shape
x_col = pyfits.Column(name='x', format='1D', array=x.flatten())
y_col = pyfits.Column(name='y', format='1D', array=y.flatten())
g1_col = pyfits.Column(name='g1', format='1D', array=g1.flatten())
g2_col = pyfits.Column(name='g2', format='1D', array=g2.flatten())
cols = pyfits.ColDefs([x_col, y_col, g1_col, g2_col])
table = pyfits.new_table(cols)
phdu = pyfits.PrimaryHDU()
hdus = pyfits.HDUList([phdu, table])
hdus.writeto('temp.fits', clobber=True)
# Define the treecorr catalog object.
cat = treecorr.Catalog('temp.fits',
x_units='degrees',
y_units='degrees',
x_col='x',
y_col='y',
g1_col='g1',
g2_col='g2')
# Define the corrfunc object
gg = treecorr.GGCorrelation(min_sep=min_sep,
max_sep=max_sep,
bin_size=0.1,
sep_units='degrees')
# Actually calculate the correlation function.
gg.process(cat)
os.remove('temp.fits')
return gg
def measure_rho(ra, dec, e1, e2, s, m_e1, m_e2, m_s, max_sep, tag=None):
"""Compute the rho statistics
"""
import treecorr
de1 = e1 - m_e1
de2 = e2 - m_e2
dt = (s**2 - m_s**2) / s**2
ecat = treecorr.Catalog(ra=ra,
dec=dec,
ra_units='deg',
dec_units='deg',
g1=e1,
g2=e2)
decat = treecorr.Catalog(ra=ra,
dec=dec,
ra_units='deg',
dec_units='deg',
g1=de1,
g2=de2)
dtcat = treecorr.Catalog(ra=ra,
dec=dec,
ra_units='deg',
dec_units='deg',
k=dt,
g1=dt * e1,
g2=dt * e2)
ecat.name = 'ecat'
decat.name = 'decat'
dtcat.name = 'dtcat'
if tag is not None:
for cat in [ecat, decat, dtcat]:
cat.name = tag + ":" + cat.name
min_sep = 0.5
bin_size = 0.5
bin_slop = 0.1
results = []
for (cat1, cat2) in [(decat, decat), (ecat, decat), (dtcat, dtcat),
(decat, dtcat), (ecat, dtcat)]:
print 'Doing correlation of %s vs %s' % (cat1.name, cat2.name)
rho = treecorr.GGCorrelation(min_sep=min_sep,
max_sep=max_sep,
sep_units='arcmin',
bin_size=bin_size,
bin_slop=bin_slop,
verbose=2)
if cat1 is cat2:
rho.process(cat1)
else:
rho.process(cat1, cat2)
results.append(rho)
return results
def jackknife(self, catalog_data, xip, xim):
" computing jack-knife covariance matrix using K-means clustering"
#k-means clustering to define areas
#NOTE: This is somewhat deprecated, the jack-knifing takes too much effort to find appropriately accurate covariance matrices.
# If you want to use this, do a quick convergence check and some timing tests on small N_clust values (~5 to start) first.
# note also that this is comparing against the (low) variance in the catalog which might not be a great comparison -no shape noise
N_clust = self.N_clust
nn = np.stack((catalog_data[self.ra], catalog_data[self.dec]), axis=1)
_, labs, _ = k_means(
n_clusters=N_clust, random_state=0, X=nn, n_jobs=-1) # check random state, n_jobs is in debugging mode
print("computing jack-knife errors")
time_jack = time.time()
# jack-knife code
xip_jack = []
xim_jack = []
gg = treecorr.GGCorrelation(
nbins=self.nbins,
min_sep=self.min_sep,
max_sep=self.max_sep,
sep_units='arcmin',
bin_slop=self.bin_slop,
verbose=True)
for i in range(N_clust):
##### shear computation excluding each jack-knife region
cat_s = treecorr.Catalog(
ra=catalog_data[self.ra][labs != i],
dec=catalog_data[self.dec][labs != i],
g1=catalog_data[self.e1][labs != i] - np.mean(catalog_data[self.e1][labs != i]),
g2=-(catalog_data[self.e2][labs != i] - np.mean(catalog_data[self.e2][labs != i])),
ra_units='deg',
dec_units='deg')
gg.process(cat_s)
xip_jack.append(gg.xip)
xim_jack.append(gg.xim)
## debugging outputs
print("xip_jack")
print(i)
print(gg.xip)
print("time = " + str(time.time() - time_jack))
### assign covariance matrix - loop is poor python syntax but compared to the time taken for the rest of the test doesn't really matter
cp_xip = np.zeros((self.nbins, self.nbins))
#TODO: check factors of N_clust here
for i in range(self.nbins):
for j in range(self.nbins):
for k in range(N_clust):
cp_xip[i][j] += N_clust/(N_clust - 1.) * (xip[i] - xip_jack[k][i] * 1.e6) * (
xip[j] - xip_jack[k][j] * 1.e6)
cp_xim = np.zeros((self.nbins, self.nbins))
for i in range(self.nbins):
for j in range(self.nbins):
for k in range(N_clust):
cp_xim[i][j] += N_clust/(N_clust - 1.) * (xim[i] - xim_jack[k][i] * 1.e6) * (
xim[j] - xim_jack[k][j] * 1.e6)
return cp_xip, cp_xim
def compute_statistic(self, i, ra, dec, q1, q2):
n = len(ra)
print(f"Computing Rowe statistic rho_{i} from {n} objects")
import treecorr
corr = treecorr.GGCorrelation(self.config)
cat1 = treecorr.Catalog(ra=ra, dec=dec, g1=q1[0], g2=q1[1], ra_units='deg', dec_units='deg')
cat2 = treecorr.Catalog(ra=ra, dec=dec, g1=q2[0], g2=q2[1], ra_units='deg', dec_units='deg')
corr.process(cat1, cat2)
return corr.meanr, corr.xip, corr.varxip**0.5
def jackknife(self, catalog_data, xip, xim):
" computing jack-knife covariance matrix using K-means clustering"
#k-means clustering to define areas
N_clust = self.N_clust
nn = np.stack((catalog_data[self.ra], catalog_data[self.dec]), axis=1)
_, labs, _ = k_means(
n_clusters=N_clust, random_state=0, X=nn,
n_jobs=-1) # check random state, n_jobs is in debugging mode
print("computing jack-knife errors")
time_jack = time.time()
# jack-knife code
xip_jack = []
xim_jack = []
gg = treecorr.GGCorrelation(nbins=self.nbins,
min_sep=self.min_sep,
max_sep=self.max_sep,
sep_units='arcmin',
bin_slop=self.bin_slop,
verbose=True)
for i in range(N_clust):
##### shear computation excluding each jack-knife region
cat_s = treecorr.Catalog(
ra=catalog_data[self.ra][labs != i],
dec=catalog_data[self.dec][labs != i],
g1=catalog_data[self.e1][labs != i] -
np.mean(catalog_data[self.e1][labs != i]),
g2=-(catalog_data[self.e2][labs != i] -
np.mean(catalog_data[self.e2][labs != i])),
ra_units='deg',
dec_units='deg')
gg.process(cat_s)
xip_jack.append(gg.xip)
xim_jack.append(gg.xim)
## debugging outputs
print("xip_jack")
print(i)
print(gg.xip)
print("time = " + str(time.time() - time_jack))
### assign covariance matrix - loop is poor python syntax but compared to the time taken for the rest of the test doesn't really matter
cp_xip = np.zeros((self.nbins, self.nbins))
for i in range(self.nbins):
for j in range(self.nbins):
for k in range(N_clust):
cp_xip[i][j] += (N_clust - 1.) / N_clust * (
xip[i] - xip_jack[k][i] * 1.e6) * (
xip[j] - xip_jack[k][j] * 1.e6)
cp_xim = np.zeros((self.nbins, self.nbins))
for i in range(self.nbins):
for j in range(self.nbins):
for k in range(N_clust):
cp_xim[i][j] += (N_clust - 1.) / N_clust * (
xim[i] - xim_jack[k][i] * 1.e6) * (
xim[j] - xim_jack[k][j] * 1.e6)
return cp_xip, cp_xim
def compute_SinglePair_GGCorrelation(cat_i, bin_i, bin_j, config):
if bin_i == bin_j:
gg = treecorr.GGCorrelation(config)
gg.process(cat_i, num_threads=ncpus)
else:
cat_j_name = input_dir + 'src-cat_z'+str(bin_j+1)+'.fits'
cat_j = treecorr.Catalog(cat_j_name, config)
gg = treecorr.GGCorrelation(config)
gg.process(cat_i, cat_j, num_threads=ncpus)
data_name = output_dir + 'gg_data/gg_z'+str(bin_i+1)+str(bin_j+1)+'.dat'
gg.write(data_name)
gg.clear()
return
def test_shuffle():
# Check that the code is insensitive to shuffling the input data vectors.
# Might as well use the same function as above, although I reduce L a bit.
ngal = 10000
gamma0 = 0.05
r0 = 10.
L = 5. * r0
numpy.random.seed(8675309)
x = (numpy.random.random_sample(ngal) - 0.5) * L
y = (numpy.random.random_sample(ngal) - 0.5) * L
r2 = (x**2 + y**2) / r0**2
g1 = -gamma0 * numpy.exp(-r2 / 2.) * (x**2 - y**2) / r0**2
g2 = -gamma0 * numpy.exp(-r2 / 2.) * (2. * x * y) / r0**2
cat_u = treecorr.Catalog(x=x, y=y, g1=g1, g2=g2)
gg_u = treecorr.GGCorrelation(bin_size=0.1,
min_sep=1.,
max_sep=30.,
verbose=1)
gg_u.process(cat_u)
# Put these in a single 2d array so we can easily use numpy.random.shuffle
data = numpy.array([x, y, g1, g2]).T
print('data = ', data)
numpy.random.shuffle(data)
cat_s = treecorr.Catalog(x=data[:, 0],
y=data[:, 1],
g1=data[:, 2],
g2=data[:, 3])
gg_s = treecorr.GGCorrelation(bin_size=0.1,
min_sep=1.,
max_sep=30.,
verbose=1)
gg_s.process(cat_s)
print('gg_u.xip = ', gg_u.xip)
print('gg_s.xip = ', gg_s.xip)
print('ratio = ', gg_u.xip / gg_s.xip)
print('diff = ', gg_u.xip - gg_s.xip)
print('max diff = ', max(abs(gg_u.xip - gg_s.xip)))
assert max(abs(gg_u.xip - gg_s.xip)) < 1.e-14
def compute_SingleMock_SinglePair_GGCorrelation(cat_i, bin_i, bin_j, config):
if bin_i == bin_j:
gg = treecorr.GGCorrelation(config)
gg.process(cat_i, num_threads=ncpus)
else:
cat_j_name = '/home/hcamacho/src_s1_z' + str(bin_j + 1) + '_c1.fits'
cat_j = treecorr.Catalog(cat_j_name, config)
gg = treecorr.GGCorrelation(config)
gg.process(cat_i, cat_j, num_threads=ncpus)
data_name = '/home/anderson/3x2pt/gg_data/gg_s1_z' + str(bin_i + 1) + str(
bin_j + 1) + '_c1.dat'
gg.write(data_name)
gg.clear()
return
def compute_SingleMock_SinglePair_GGCorrelation(cat_i, bin_i, bin_j, config):
if bin_i == bin_j:
gg = treecorr.GGCorrelation(config)
gg.process(cat_i, num_threads=ncpus)
else:
cat_j_name = input_dir + 'src-cat_z' + str(bin_j + 1) + '.fits'
cat_j = treecorr.Catalog(cat_j_name, config)
gg = treecorr.GGCorrelation(config)
gg.process(cat_i, cat_j, num_threads=ncpus)
data_name = '/home/anderson/3x2pt/gg_data/gg_z' + str(bin_i +
1) + str(bin_j +
1) + '.dat'
gg.write(data_name)
gg.clear()
return
'''
Process a single pair of catalogs, accumulating the cross-correlation.
This accumulates the weighted sums into the bins, but does not finalize
the calculation by dividing by the total weight at the end. After
calling this function as often as desired, the finalize() command will
finish the calculation.
src_cats = [ treecorr.Catalog(names, config) for names in src_names ]
gg = treecorr.GGCorrelation(config)
varg = treecorr.calculateVarG(src_cats)
for cat1, cat2 in zip(src_cats, src_cats):
gg.process_cross(cat1, cat2)
gg.write()
'''
'''
def correlation_function_ellipticity(ra, dec, e1_res, e2_res,
nbins=20, min_sep=0.25, max_sep=20,
sep_units='arcmin', verbose=False):
"""Compute shear-shear correlation function from ra, dec, g1, g2.
Default parameters for nbins, min_sep, max_sep chosen to cover
an appropriate range to calculate TE1 (<=1 arcmin) and TE2 (>=5 arcmin).
Parameters
----------
ra : numpy.array
Right ascension of points [radians]
dec : numpy.array
Declination of points [radians]
e1_res : numpy.array
Residual ellipticity 1st component
e2_res : numpy.array
Residual ellipticity 2nd component
nbins : float, optional
Number of bins over which to analyze the two-point correlation
min_sep : float, optional
Minimum separation over which to analyze the two-point correlation
max_sep : float, optional
Maximum separation over which to analyze the two-point correlation
sep_units : str, optional
Specify the units of min_sep and max_sep
verbose : bool
Request verbose output from `treecorr`.
verbose=True will use verbose=2 for `treecorr.GGCorrelation`.
Returns
-------
r, xip, xip_err : each a np.array(dtype=float)
- The bin centers, two-point correlation, and uncertainty.
"""
# Translate to 'verbose_level' here to refer to the integer levels in TreeCorr
# While 'verbose' is more generically what is being passed around
# for verbosity within 'validate_drp'
if verbose:
verbose_level = 2
else:
verbose_level = 0
catTree = treecorr.Catalog(ra=ra, dec=dec, g1=e1_res, g2=e2_res,
dec_units='radian', ra_units='radian')
gg = treecorr.GGCorrelation(nbins=nbins, min_sep=min_sep, max_sep=max_sep,
sep_units=sep_units,
verbose=verbose_level)
gg.process(catTree)
r = np.exp(gg.meanlogr) * u.arcmin
xip = gg.xip * u.Unit('')
xip_err = np.sqrt(gg.varxi) * u.Unit('')
return (r, xip, xip_err)
def run_parallel():
t0 = time.time()
print(rank, socket.gethostname(), flush=True)
fname = file_name.replace('.fits', '_%d.fits' % rank)[:]
log_file = 'parallel_%d.log' % rank
# All processes make the full cat with these patches.
# Note: this doesn't actually read anything from disk yet.
cat = treecorr.Catalog(fname,
ra_col=ra_col,
dec_col=ra_col,
ra_units=ra_units,
dec_units=dec_units,
g1_col=g1_col,
g2_col=g1_col,
flag_col=flag_col,
verbose=1,
log_file=log_file,
patch_centers=patch_file)
t1 = time.time()
print('Made cat', t1 - t0, flush=True)
# Everyone needs to make their own Correlation object.
gg = treecorr.GGCorrelation(bin_size=bin_size,
min_sep=min_sep,
max_sep=max_sep,
sep_units='arcmin',
bin_slop=bin_slop,
verbose=1,
log_file=log_file)
cat.load()
t2 = time.time()
print(rank, 'Loaded', t2 - t1, flush=True)
cat.get_patches()
t3 = time.time()
print(rank, 'Made patches', t3 - t2, flush=True)
# To use the multiple process, just pass comm to the process command.
gg.process(cat, comm=comm, low_mem=low_mem)
t4 = time.time()
print(rank, 'Processed', t4 - t3, flush=True)
comm.Barrier()
t5 = time.time()
print(rank, 'Barrier', t5 - t4, flush=True)
print(rank, 'Done with parallel computation', t5 - t0, flush=True)
# rank 0 has the completed result.
if rank == 0:
print('xip = ', gg.xip, flush=True)
def get_xi(map, window_norm, mask=None, Sim_jk=None):
self = Sim_jk
maps = {'galaxy': map[0]}
maps['shear'] = {0: map[1], 1: map[2]}
if mask is None:
mask = {}
mask['galaxy'] = maps['galaxy'] == hp.UNSEEN
mask['shear'] = maps['shear'][0] == hp.UNSEEN
tree_cat_args = get_treecorr_cat_args(maps, masks=mask, nside=Sim_jk.nside)
tree_cat = {}
tree_cat['galaxy'] = treecorr.Catalog(w=maps['galaxy'][~mask['galaxy']],
**tree_cat_args['galaxy'])
tree_cat['shear'] = treecorr.Catalog(g1=maps['shear'][0][~mask['shear']],
g2=maps['shear'][1][~mask['shear']],
**tree_cat_args['shear'])
del mask
ndim = 3 #FIXME
xi = np.zeros(self.n_th_bins * (self.ndim + 1))
th_i = 0
tree_corrs = {}
n_th_bins = self.n_th_bins
for corr in self.kappa_class.corrs: #note that in treecorr npairs includes pairs with 0 weights. That affects this calc
if corr == corr_ggl:
tree_corrs[corr] = treecorr.NGCorrelation(**corr_config)
tree_corrs[corr].process(tree_cat['galaxy'], tree_cat['shear'])
xi[th_i:th_i + n_th_bins] = tree_corrs[corr].xi * tree_corrs[
corr].weight / window_norm[corr][
'weight'] * -1 #sign convention
#
th_i += self.n_th_bins
if corr == corr_ll:
tree_corrs[corr] = treecorr.GGCorrelation(**corr_config)
tree_corrs[corr].process(tree_cat['shear'])
xi[th_i:th_i + n_th_bins] = tree_corrs[
corr].xip #*tree_corrs[corr].npairs/window_norm[corr]['weight']
th_i += n_th_bins
xi[th_i:th_i + n_th_bins] = tree_corrs[
corr].xim #*tree_corrs[corr].npairs/window_norm[corr]['weight']
th_i += n_th_bins
if corr == corr_gg:
tree_corrs[corr] = treecorr.NNCorrelation(**corr_config)
tree_corrs[corr].process(tree_cat['galaxy'])
xi[th_i:th_i + n_th_bins] = tree_corrs[corr].weight / tree_corrs[
corr].npairs #window_norm[corr]['weight'] #
# xi[th_i:th_i+n_th_bins]=tree_corrs[corr].weight/window_norm[corr]
th_i += n_th_bins
# del tree_cat,tree_corrs
# gc.collect()
return xi
def main():
import treecorr
import numpy as np
import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot as plt
ax = np.array([0, 1, 2])
ay = np.array([0, 0, 0])
a1 = np.array([ -1,-2, 3])
a2 = np.array([ - 4, 5, 6])
acat = treecorr.Catalog(x=ax, y=ay, g1=a1, g2=a2)
bx = np.array([0, 1.1, 2.1])
by = np.array([0, 0, 0])
b1 = np.array([ -7,8, 9])
b2 = np.array([ -10, 11,- 12])
bcat = treecorr.Catalog(x=bx, y=by, g1=b1, g2=b2)
gg = treecorr.GGCorrelation(min_sep=0.1, max_sep=3, bin_size=0.1)
gg.process(acat, bcat)
var = np.array((2*gg.varxi).tolist())
npairs = np.array(gg.npairs.tolist())
meanr = np.array(gg.meanlogr.tolist())
xip_real = np.array(gg.xip.tolist())
xip_im = np.array(gg.xip_im.tolist())
xim_real = np.array(gg.xim.tolist())
xim_im = np.array(gg.xim_im.tolist())
print(meanr)
print(xip_real)
#print(xip_im)
#print(xim_real)
#print(xim_im)
plt.clf()
pretty_rho(meanr, npairs, sig=np.zeros(len(meanr)), legend=None, lfontsize=24, color='black', marker='o', ylabel='Npairs')
#plt.xlim( [0.01,10.] )
fname = '/home/dfa/sobreira/alsina/basic_tools/examples/npairs.pdf'
plt.savefig(fname)
plt.clf()
pretty_rho(meanr, xip_real, sig=np.zeros(len(meanr)) , legend='xip_real', lfontsize=24, color='black', marker='o')
#pretty_rho(meanr, xip_real, sig=np.sqrt(var) , legend='xip_real', lfontsize=24, color='black', marker='o')
plt.xlim( [0.01,5.] )
fname = '/home/dfa/sobreira/alsina/basic_tools/examples/xip_real.pdf'
plt.savefig(fname)
'''
def compute(options):
print 'Shape data : %s'%options['output']
data = fi.FITS(options['2pt']['shapes'])[-1].read()
splitflag=options['2pt']['split']
if splitflag is not None:
name = options['2pt']['split']
print 'Dividing catalogue by %s'%name
mask = (data[name]>=options['2pt']['split_val'])
print '%3.3f percent split'%(data[name][mask].size*100./data[name].size)
else:
print 'No catalogue split required.'
mask = np.ones(data.size).astype(bool)
print 'Setting up correlations'
cat1 = treecorr.Catalog(x=data['x'][mask], y=data['y'][mask], z=data['z'][mask], a=data['a1'][mask], b=data['a2'][mask], c=data['a3'][mask])
c1c1 = treecorr.GGCorrelation(min_sep=options['2pt']['rmin'], max_sep=options['2pt']['rmax'], nbins=options['2pt']['nbin'])
if splitflag:
cat2 = treecorr.Catalog(x=data['x'][np.invert(mask)], y=data['y'][np.invert(mask)], z=data['z'][mask], a=data['a1'][np.invert(mask)], b=data['a2'][np.invert(mask)], c=data['a3'][np.invert(mask)])
c2c2 = treecorr.GGCorrelation(min_sep=options['2pt']['rmin'], max_sep=options['2pt']['rmax'], nbins=options['2pt']['nbin'])
c1c2 = treecorr.GGCorrelation(min_sep=options['2pt']['rmin'], max_sep=options['2pt']['rmax'], nbins=options['2pt']['nbin'])
suffix = '_splitby%s'%options['2pt']['split']
else:
suffix=''
print 'Computing correlation functions.'
c1c1.process(cat1,cat1)
util.export_treecorr_output('%s/xigg_corr_11%s.txt'%(options['2pt']['savedir'], suffix), c1c1)
if split:
c2c2.process(cat2,cat2)
util.export_treecorr_output('%s/xigg_corr_22%s.txt'%(options['2pt']['savedir'], suffix), c2c2)
c1c2.process(cat1,cat2)
util.export_treecorr_output('%s/xigg_corr_12%s.txt'%(options['2pt']['savedir'], suffix), c1c2)
print 'Done'
def run_rho(data, results, band):
print('run_rho for ', band)
print('len(data) = ', len(data))
dt = (data['T_data'] - data['T_model']) / data['T_data']
ecat = treecorr.Catalog(ra=data['ra'],
dec=data['dec'],
ra_units='deg',
dec_units='deg',
g1=data['g1_data'],
g2=data['g2_data'])
qcat = treecorr.Catalog(ra=data['ra'],
dec=data['dec'],
ra_units='deg',
dec_units='deg',
g1=data['g1_data'] - data['g1_model'],
g2=data['g2_data'] - data['g2_model'])
wcat = treecorr.Catalog(ra=data['ra'],
dec=data['dec'],
ra_units='deg',
dec_units='deg',
g1=data['g1_data'] * dt,
g2=data['g2_data'] * dt)
ecat.name = 'ecat'
qcat.name = 'qcat'
wcat.name = 'wcat'
bin_config = dict(
sep_units='arcmin',
bin_slop=0.1,
min_sep=0.5,
max_sep=250.,
bin_size=0.2,
)
pairs = [(qcat, qcat), (ecat, qcat), (wcat, wcat), (qcat, wcat),
(ecat, wcat), (ecat, ecat)]
print('data has %s stars' % ecat.ntot)
for (cat1, cat2) in pairs:
print('Doing correlation of %s band %s vs %s' %
(band, cat1.name, cat2.name))
rho = treecorr.GGCorrelation(bin_config, verbose=2)
if cat1 is cat2:
rho.process(cat1)
else:
rho.process(cat1, cat2)
print('mean xi+ = ', rho.xip.mean())
print('mean xi- = ', rho.xim.mean())
results[(band, cat1.name, cat2.name)] = rho
def CorrFunc(cat1, cat2,
outpath, nbins, mins, maxs, units, bin_slop, nthr):
"""
Function for correlation calculation (auto & cross)
"""
gg = treecorr.GGCorrelation(nbins=nbins, min_sep=mins, max_sep=maxs,
sep_units=units, bin_slop=bin_slop)
if cat2 == None:
# auto-correlation
gg.process(cat1, num_threads=nthr)
else:
# cross-correlation
gg.process(cat1, cat2, num_threads=nthr)
gg.write(outpath)
print("TreeCorr results saved in", outpath)
def loop_2pt_noweight(catname, ii):
t0 = time.time()
cnt = 0
for j in range(36):
for i in range(8):
for zbin in range(4):
for k in range(3):
if cnt > 225:
continue
if (cnt + 1) % 5 != ii:
continue
print j, i, k, time.time() - t0
out = methods.rotate_mock_rescale_nsigma(zbin + 1,
i + 1,
j + 1,
wfile=None)
cat = treecorr.Catalog(g1=out['e1'],
g2=out['e2'],
w=out['w'],
ra=out['ra'],
dec=out['dec'],
ra_units='deg',
dec_units='deg')
gg = treecorr.GGCorrelation(nbins=20,
min_sep=2.5,
max_sep=250.,
sep_units='arcmin',
bin_slop=0.2,
verbose=0)
gg.process(cat)
d = {
'theta': np.exp(gg.meanlogr),
'xip': gg.xip,
'xim': gg.xim,
'err': np.sqrt(gg.varxi)
}
save_obj(
d, 'text/flask_GG_' + catname + '_noweight_' +
str(zbin) + '_' + str(cnt) + '.cpickle')
cnt += 1
return
def run_serial():
from test_helper import profile
t0 = time.time()
fname = file_name.replace('.fits', '_0.fits')
log_file = 'serial.log'
cat = treecorr.Catalog(fname,
ra_col=ra_col,
dec_col=ra_col,
ra_units=ra_units,
dec_units=dec_units,
g1_col=g1_col,
g2_col=g1_col,
flag_col=flag_col,
verbose=1,
log_file=log_file,
patch_centers=patch_file)
t1 = time.time()
print('Made cat', t1 - t0)
gg = treecorr.GGCorrelation(bin_size=bin_size,
min_sep=min_sep,
max_sep=max_sep,
sep_units='arcmin',
bin_slop=bin_slop,
verbose=1,
log_file=log_file)
# These next two steps don't need to be done separately. They will automatically
# happen when calling process. But separating them out makes it easier to profile.
with profile():
cat.load()
t2 = time.time()
print('Loaded', t2 - t1)
with profile():
cat.get_patches()
t3 = time.time()
print('Made patches', t3 - t2)
with profile():
gg.process(cat, low_mem=low_mem)
t4 = time.time()
print('Processed', t4 - t3)
print('Done with non-parallel computation', t4 - t0)
print('xip = ', gg.xip, flush=True)
def get_Maps(cat, theta_min, theta_max, ntheta, bin_slop):
config = {
'min_sep': theta_min,
'max_sep': theta_max,
'nbins': ntheta,
'bin_slop': bin_slop,
'sep_units': 'arcmin',
'verbose': 1,
'num_threads': Map_threads,
}
gg = treecorr.GGCorrelation(**config)
gg.process(cat)
theta = gg.meanr
Mapsq, Mapsq_im, Mxsq, Mxsq_im, varMapsq = gg.calculateMapSq()
return (theta, Mapsq, Mapsq_im, Mxsq, Mxsq_im, varMapsq)
def compute_shear_shear(self, i, j, cat1, cat2):
maski = (cat1.mask) & (self.p1 == i)
maskj = (cat2.mask) & (self.p2 == j)
# Initialised the catlogues
namei_1, namei_2 = colnames[self.corrtype[0]]
cat_i = treecorr.Catalog(g1=cat1.cols[namei_1][maski],
g2=cat1.cols[namei_2][maski],
ra=cat1.cols['ra'][maski],
dec=cat1.cols['dec'][maski],
ra_units='deg',
dec_units='deg')
namej_1, namej_2 = colnames[self.corrtype[1]]
cat_j = treecorr.Catalog(g1=cat2.cols[namej_1][maskj],
g2=cat2.cols[namej_2][maskj],
ra=cat2.cols['ra'][maskj],
dec=cat2.cols['dec'][maskj],
ra_units='deg',
dec_units='deg')
# Set up the correlation
# Note that we're using the binning configuration from
# the first of the two config files
# might be good to check and give a warning if the two files
# specify different 2pt binning parameters
gg = treecorr.GGCorrelation(nbins=cat1.info['tbins'],
min_sep=cat1.info['tmin'],
max_sep=cat1.info['tmax'],
sep_units='arcmin',
bin_slop=0.1,
verbose=True,
num_threads=1)
# And process it
gg.process(cat_i, cat_j)
theta = np.exp(gg.meanlogr)
xip = gg.xip
xim = gg.xim
xiperr = ximerr = np.sqrt(gg.varxi)
return theta, xip, xim, xiperr, ximerr
def GGCorrelation(self):
"""
Caclulates 2D correlation function using Catalog's ra, dec.
Requires randcatalog to exist.
Returns tuple (logr, meanlogr, xip, xim, xivar)
"""
catS = treecorr.Catalog(ra=self.catalog["ra"], dec=self.catalog["dec"],
ra_units="radians", dec_units="radians", g1=self.catalog["g1"],
g2=self.catalog["g2"] )
dd=treecorr.GGCorrelation(min_sep=self.min_sep, bin_size=self.bin_size,
max_sep=self.max_sep, sep_units='arcmin')
dd.process(catS)
logr = dd.logr
meanlogr = dd.logr
xip=dd.xip
xim=dd.xim
xivar=dd.varxi
return (logr, meanlogr, xip, xim, xivar)
def get_2pt(self, corr1, corr2, nbins=12, error_type="bootstrap", xmin=1, xmax=300, units="arcmin"):
correlation_lookup = {"psf":("mean_psf_e%d_sky", self.res), "gal":("e%d", self.res)}
if hasattr(self,"truth"): correlation_lookup["int"] = ("intrinsic_e%d", self.truth)
c1, data1 = correlation_lookup[corr1]
c2, data2 = correlation_lookup[corr2]
print "Will correlate columns %s and %s."%(c1,c2),
cat1 = tc.Catalog(ra=self.res["ra"]*60, dec=self.res["dec"]*60, ra_units=units, dec_units=units, g1=data1[c1%1], g2=data1[c1%2])
cat2 = tc.Catalog(ra=self.res["ra"]*60, dec=self.res["dec"]*60, ra_units=units, dec_units=units, g1=data2[c2%1], g2=data2[c2%2])
gg = tc.GGCorrelation(nbins=nbins, min_sep=xmin, max_sep=xmax, sep_units=units)
gg.process(cat1,cat2)
setattr(gg, "theta", np.exp(gg.logr))
print "stored"
self.corr[(corr1,corr2)]=gg
def shearshear(self, cat1, cat2=None):
'''calculate shear-shear correlation '''
ggkwargs = {
'min_sep': 3,
'max_sep': 90,
'nbins': 12,
'sep_units': 'arcmin'
}
gg = treecorr.GGCorrelation(**ggkwargs)
tree_cat1 = self.io.df_to_corr(cat1, shears=True)
if cat2 is not None:
tree_cat2 = self.io.df_to_corr(cat2, shears=True)
gg.process(tree_cat1, tree_cat2)
else:
gg.process(tree_cat1)
r = np.exp(gg.meanlogr)
xip = gg.xip
xim = gg.xim
sig = np.sqrt(gg.varxip)
return {'xip': xip, 'xim': xim, 'r': r, 'sig': sig}
def compute_xi(ra, dec, e1, e2, w, s):
# Apply the mean sensitivity in each case
#means = numpy.sum(w*s) / numpy.sum(w)
#e1c = e1 / means
#e2c = e2 / means
# Build a TreeCorr catalog
cat = treecorr.Catalog(ra=ra,
dec=dec,
g1=e1,
g2=e2,
k=s,
w=w,
ra_units='deg',
dec_units='deg')
# Compute the correlation function
gg = treecorr.GGCorrelation(bin_size=0.05,
min_sep=0.1,
max_sep=500,
sep_units='arcmin',
output_dots=True,
verbose=2)
ss = treecorr.KKCorrelation(bin_size=0.05,
min_sep=0.1,
max_sep=500,
sep_units='arcmin',
output_dots=True,
verbose=2)
print 'Start corr2'
gg.process(cat)
ss.process(cat)
gg.xip /= ss.xi
gg.xim /= ss.xi
gg.varxi /= ss.xi**2
return gg