s function code from m file
in [Matlab]
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From: Haitham Tahbub on 30 Apr 2010 19:02 Hi all , i have a function called the dynamic programming. i have the m file function and i want to build this function in Simulink . i tried days and weeks to bulid this as blocks but i failed . I asked for this , they told me that converting it to s-function block is easier but i have no idea of s-function from m file . help me please in imleminting the s-function code that i can load to the s-function block and use one block for this function , My function code is :- function [p,q,D] = dp(M) % [p,q] = dp(M) % Use dynamic programming to find a min-cost path through matrix M. % Return state sequence in p,q [r,c] = size(M); % costs D = zeros(r+1, c+1); D(1,:) = NaN; D(:,1) = NaN; D(1,1) = 0; D(2:(r+1), 2:(c+1)) = M; % traceback phi = zeros(r,c); for i = 1:r; for j = 1:c; [dmax, tb] = min([D(i, j), D(i, j+1), D(i+1, j)]); D(i+1,j+1) = D(i+1,j+1)+dmax; phi(i,j) = tb; end end % Traceback from top left i = r; j = c; p = i; q = j; while i > 1 & j > 1 tb = phi(i,j); if (tb == 1) i = i-1; j = j-1; elseif (tb == 2) i = i-1; elseif (tb == 3) j = j-1; else error; end p = [i,p]; q = [j,q]; end % Strip off the edges of the D matrix before returning D = D(2:(r+1),2:(c+1)); ============== Thanks all Regards Haitham |