It would be great to see a simplified example of what you're trying to do. What you can do with gpuArray/arrayfun is write a nested function to access constant data from a parent workspace, a bit like this:
function [r,c] = example
% up-level variables that we will access inside the nested
% function "iFindLocation"
mat = gpuArray(magic(4));
[m,n] = size(mat);
[r,c] = arrayfun(@iFindLocation, gpuArray(1:100));
function [r,c] = iFindLocation(in)
r = NaN; c = NaN;
for i = 1:m
for j = 1:n
% Access the matrix "mat" from the parent
% workspace
if mat(i,j) == in
r = i;
c = j;
end
end
end
end
end
