% -*- texinfo -*-
%
% @deftypefn {Function File} {[@var{gx},@var{gy}]} = BIM2Cpdegrad(@var{mesh},@var{u})
%
% Build the P1 approximation to the gradient of a computed solution.
%
% Input:
% @itemize @minus
% @item @var{mesh}: PDEtool-like mesh with required field 'p', 'e', 't'.
% @item @var{u}: piecewise linear conforming scalar function.
% @end itemize
%
% @seealso{BIM2Cglobalflux}
% @end deftypefn