MATLAB: Negative index of a matrix

negative indexnegative index of a matrix

for n=1:5
for m=-n:n
a(m,n)=m*n
end
end
end
I got an equation like this but I got negative indexes , how can I solve this problem? Thanks for helping.

Best Answer

 for n = 1:5
   m = -n:n;
   for i = 1:numel(m)
     A(i, n) = m(i)*n;
   end
 end
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