sp_validation.rho_tau

_extract_xip(correlations)[source]

Return flattened array of xip values from a list of correlations.

get_params_rho_tau(cat, survey='other')[source]
get_rho_tau_w_cov(config, version, treecorr_config, outdir, base, method, cov_rho=False, npatch=None)[source]

Compute rho/tau statistics and, if requested, their covariance.

get_rho_tau(config, version, treecorr_config, outdir, base, cov_rho=False, npatch=None)[source]

Compute rho and tau statistics for a given version of the catalogue.

Parameters:

  • config (dict) – Configuration file.

  • version (str) – Version of the catalogue to use.

  • treecorr_config (dict) – TreeCorr configuration (must include ‘min_sep’, ‘max_sep’, and ‘nbins’).

  • outdir (str) – Output directory.

get_theory_cov(config, version, treecorr_config, outdir, base, nbin_ang=100, nbin_rad=100)[source]

Compute an analytical estimate of the covariance matrix of rho and tau-statistics.

get_jackknife_cov(config, version, treecorr_config, outdir, base, npatch, ncov=100)[source]

Compute the covariance matrix of rho and tau-statistics using the jackknife method. Also compute rho and tau-statistics.

get_samples(psf_fitter, version, base, cov_type='jk', apply_debias=None, sampler='emcee')[source]

Return (alpha, beta, eta) samples using emcee or least squares.

Parameters:

  • psf_fitter (PSFFitter) – PSF fitter instance that provides load_* helpers.

  • version (str) – Catalog identifier whose rho/tau statistics are sampled.

  • base (str) – Precomputed basename (e.g. SP_v1.4_minsep=…) used for filenames.

  • cov_type (str, optional) – Covariance label ('jk', 'th', or 'sim'). Defaults to 'jk'.

  • apply_debias (int or None, optional) – Jackknife patch count used to debias samples. Disabled when None.

  • sampler (str, optional) – 'emcee' for MCMC sampling, 'lsq' for least squares (default 'emcee').

get_samples_emcee(psf_fitter, version, base, nwalkers=124, nsamples=10000, cov_type='jk', apply_debias=None)[source]

Draw (alpha, beta, eta) samples using emcee and the tau covariance.

Parameters:

  • psf_fitter (PSFFitter) – PSF fitter instance managing rho/tau statistics and covariances.

  • version (str) – Catalog identifier whose rho/tau statistics are sampled.

  • base (str) – Precomputed basename for locating statistics/covariance files.

  • nwalkers (int, optional) – Number of walkers for the MCMC run (default 124).

  • nsamples (int, optional) – Number of samples drawn per walker (default 10000).

  • cov_type (str, optional) – Covariance label ('jk'/'th'/'sim'). Defaults to 'jk'.

  • apply_debias (int or None, optional) – Jackknife patch count applied during debiasing. Disabled when None.

get_samples_lsq(psf_fitter, version, base, apply_debias=None, cov_type='jk')[source]

Compute least-squares samples of (alpha, beta, eta) using the tau covariance.

Parameters:

  • psf_fitter (PSFFitter) – PSF fitter instance managing rho/tau statistics and covariances.

  • version (str) – Catalog identifier whose rho/tau statistics are sampled.

  • base (str) – Precomputed basename for locating statistics/covariance files.

  • apply_debias (int or None, optional) – Jackknife patch count applied during debiasing. Disabled when None.

  • cov_type (str, optional) – Covariance label (defaults to 'jk').