There are a couple issues with your code. The main issue is that the line
A{k,t}(:,1)<-1
will have a vector output, and therefore the if statement is not doing what you expect. (It would have to be true for every value in the vector, to trigger the if.)
A more straightforward way to do this is as follows:
for k=1:2
for t=1:100
A{k,t} = max(A{k,t},-1);
A{k,t} = min(A{k,t}, 2);
end
end
which compares each element of the vector to the threshold value, and replaces it if necessary.
This same operation can be done very compactly, eliminating the for loops completely, with the cellfun function instead:
A = cellfun(@(x)max(x,-1),A,'UniformOutput',false);
A = cellfun(@(x)min(x, 2),A,'UniformOutput',false);
You can even collapse this into a one-liner:
A = cellfun(@(x)min(2,max(x,-1)),A,'UniformOutput',false);
but what you are doing starts to get a little "obfuscated".
(The for loop seems to be the faster method, though, in the limited testing I did.)
