Mercurial > repos > public > sbplib
comparison +grid/evalOn.m @ 157:ea8103ad2cc5 feature/grids
Added function eval on.
| author | Jonatan Werpers <jonatan@werpers.com> |
|---|---|
| date | Fri, 19 Feb 2016 14:28:27 +0100 |
| parents | |
| children | 0e56192f6459 |
comparison
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| 156:095cdd472688 | 157:ea8103ad2cc5 |
|---|---|
| 1 % Takes a funciton and evaluates it on a grid to return a grid function in the | |
| 2 % form of a (n*k)x1 vector, where n is the number of grid points and k is the | |
| 3 % number of components of the function. | |
| 4 % g -- Grid to evaluate on. | |
| 5 % func -- Function to evaluate. May be a function handle or a constant. If | |
| 6 % it is a vector value it has to be provided as a column vector, | |
| 7 function gf = evalOn(g, func) | |
| 8 if ~isa(func, 'function_handle') | |
| 9 % We should have a constant. | |
| 10 if size(func,2) ~= 1 | |
| 11 error('grid:evalOn:VectorValuedWrongDim', 'A vector valued function must be given as a column vector') | |
| 12 end | |
| 13 | |
| 14 gf = repmat(func,[g.N, 1]); | |
| 15 return | |
| 16 end | |
| 17 % func should now be a function_handle | |
| 18 | |
| 19 % Get coordinates and convert to cell array for easier use as a parameter | |
| 20 x = g.points(); | |
| 21 X = {}; | |
| 22 for i = 1:size(x, 2) | |
| 23 X{i} = x(:,i); | |
| 24 end | |
| 25 | |
| 26 % Find the number of components | |
| 27 x0 = num2cell(x(1,:)); | |
| 28 f0 = func(x0{:}); | |
| 29 k = length(f0); | |
| 30 | |
| 31 if size(f0,2) ~= 1 | |
| 32 error('grid:evalOn:VectorValuedWrongDim', 'A vector valued function must be given as a column vector') | |
| 33 end | |
| 34 | |
| 35 gf = func(X{:}); | |
| 36 gf = reshape(reshape(gf, [g.N, k])', [g.N*k, 1]); % Reorder so that componets sits together. | |
| 37 end |