stats - Statistics#

gammapy.stats Package#



cash(n_on, mu_on[, truncation_value])

Cash statistic, for Poisson data.

cash_sum_cython(counts, npred)

Summed cash fit statistics.

cstat(n_on, mu_on[, truncation_value])

C statistic, for Poisson data.

f_cash_root_cython(x, counts, background, model)

Function to find root of.

get_wstat_gof_terms(n_on, n_off)

Goodness of fit terms for WSTAT.

get_wstat_mu_bkg(n_on, n_off, alpha, mu_sig)

Background estimate mu_bkg for WSTAT.

norm_bounds_cython(counts, background, model)

Compute bounds for the root of _f_cash_root_cython.

wstat(n_on, n_off, alpha, mu_sig[, mu_bkg, ...])

W statistic, for Poisson data with Poisson background.

compute_fvar(flux, flux_err[, axis])

Calculate the fractional excess variance.

compute_fpp(flux, flux_err[, axis])

Calculate the point-to-point excess variance.

compute_flux_doubling(flux, flux_err, coords)

Compute the minimum characteristic flux doubling and halving over a certain coordinate axis for a series of measurements.


Calculate the chi-square test for LightCurve.


CashCountsStatistic(n_on, mu_bkg)

Class to compute statistics for Poisson distributed variable with known background.

WStatCountsStatistic(n_on, n_off, alpha[, ...])

Class to compute statistics for Poisson distributed variable with unknown background.