How to store value generated from nested for loop in an array, in Matlab?

问题

y = find(sA);
l = y + sA;

for i=1:10
  for j=1
      l = l + sA;
  end
  y = y + length(y);
end

I would like to know how to store the value that is generated for l, for each iteration, in an array.

When I try do something like l(l) = l + sA; I obtain 'weird' results.

NOTE: PLEASE READ MY COMMENTS POSTED BELOW. THANKS!

回答1:

For a complex loop, usually I do something like this:

results = zeros(expectedLength,1);
ixNextResult = 1;

for ixForLoop1 = 1:10
    for ixForLoop2 = 20:30
        ..
        results(ixNextResult) = calculationResult;
        ixnextResult = ixNextResult + 1;
    end
end

I'm having a hard time understanding what your code is trying to accomplish, so I'm not sure what to change. For example the snippet l(l) = l+sA does not make a lot of sens to me.

回答2:

Try it like this:

y = find(sA); %This is incredibly strange! What exactly are you trying to achieve with this line?
l = y + sA;

for i=1:10
  l = l + sA;
  StoredL(i, :) = l;
  y = y + length(y); %This line does nothing??? Why is it here?
end

I removed your inner loop as it was doing nothing, for j = 1 will only ever run once so what's the point?

来源：https://stackoverflow.com/questions/12272559/how-to-store-value-generated-from-nested-for-loop-in-an-array-in-matlab