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view gridDerivatives.m @ 104:ffd9e68f63cc feature/arclen-param

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Splined in the other direction! Works great. Runs faster. Removed ugly fix outside [0,1] in spline(). Camelcased numerical_derivative().
author Martin Almquist <martin.almquist@it.uu.se>
date Mon, 07 Dec 2015 18:46:59 +0100
parents 48b6fb693025
children
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% 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