% -*- texinfo -*-
% @deftypefn {Function File} {[@var{pval}, @var{chisq}, @var{df}] =} chisquare_test_independence (@var{x})
% Perform a chi-square test for independence based on the contingency
% table @var{x}. Under the null hypothesis of independence,
% @var{chisq} approximately has a chi-square distribution with
% @var{df} degrees of freedom.
%
% The p-value (1 minus the CDF of this distribution at chisq) of the
% test is returned in @var{pval}.
%
% If no output argument is given, the p-value is displayed.
% @end deftypefn