% -*- texinfo -*-
% @deftypefn {Function File} {[@var{count}, @var{mean}, @var{var}] =} spstats (@var{s})
% @deftypefnx {Function File} {[@var{count}, @var{mean}, @var{var}] =} spstats (@var{s}, @var{j})
% Return the stats for the non-zero elements of the sparse matrix @var{s}.
% @var{count} is the number of non-zeros in each column, @var{mean}
% is the mean of the non-zeros in each column, and @var{var} is the
% variance of the non-zeros in each column.
%
% Called with two input arguments, if @var{s} is the data and @var{j}
% is the bin number for the data, compute the stats for each bin. In
% this case, bins can contain data values of zero, whereas with
% @code{spstats (@var{s})} the zeros may disappear.
% @end deftypefn