How can I put the outputs of for loop into a matrix?
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Eray Bozoglu
on 30 Nov 2020
Commented: Eray Bozoglu
on 1 Dec 2020
Hey i am new to matlab and need help with storing answer of my for loop into a matrix can anyone help ?
my aim is having (n x n) matrix. thanks a lot
n=input('please enter n>');
for j=1:n
for i=1:n
a=(5*(i/n))+(8*(j/n));
end
end
3 Comments
Rik
on 30 Nov 2020
You are still overwriting a in every iteration.
Did you do a basic Matlab tutorial?
Accepted Answer
John D'Errico
on 30 Nov 2020
Edited: John D'Errico
on 30 Nov 2020
First, don't use loops at all. For example, with n==3...
n = 3;
ind = 1:n;
a = ind.'*5/n + ind*8/n
Since this is probably homework, and a loop is required, while I tend not to do homework assignments, you came pretty close. You made only two mistakes. First, you did not preallocate a, which is important for speed, but not crucial. It would still run without that line. Second, you are stuffing the elements as created into a(i,j). So you need to write it that way.
n = 3;
a = zeros(n); % preallocate arrays
for i = 1:n
for j = 1:n
a(i,j) = (5*(i/n))+(8*(j/n));
end
end
a
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