Mercurial > repos > public > sbplib

view gridDerivatives.m @ 1039:a8ee5eca0e6c feature/burgers1d

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Allow for the residual normalization function to return a vector. Also change the default normalization from normalizing on norm(u-mean(u),inf) to norm(u/2), since this proved to be better for 1d burgers
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Fri, 18 Jan 2019 09:06:20 +0100
parents 48b6fb693025
children
line wrap: on
line source

% Calculates derivatives in all directions of function.
% Uses multi-dim vector form.
%   gridDerivatives(F,Dx,Dy)
%   gridDerivatives(F,Dx,Dy,Dz)
function varargout = gridDerivatives(F, varargin)
    assert(length(varargin) == ndims(F));

    switch ndims(F)
        case 2
            varargout{1} = (varargin{1}*F')';
            varargout{2} = varargin{2}*F;
        otherwise
            error('Not implemented for ndims(F) = %d',ndims(F));
    end
end