Problems with double looping

4 views (last 30 days)
I am trying to implement this double loop. There is lot of material online on double looping in matlab but I don't manage to make it work.
This is my code:
debt = nan(49,1)
for j = -(6:12)
for i = 2:8
debt(j, i) = ((1 + 0.93) - (1 + j)) + 134.77 + (i - 3.3)
end
end
I would like to be able to save debt as a 49x1 vector.
What's wrong with my loop?
Thanks

Accepted Answer

Andrei Bobrov
Andrei Bobrov on 8 Apr 2020
Edited: Andrei Bobrov on 8 Apr 2020
Just:
ii = 2:8;
jj = -(6:12);
debt = 132.4 - jj(:) + ii(:)';
debt = debt(:);
or with for-loop:
ii = 2:8;
jj = -(6:12);
debt = nan(7);
for j = 1:7
for i = 1:7
debt(j, i) = 132.4 - jj(j) + ii(i);
end
end
  4 Comments
Andrei Bobrov
Andrei Bobrov on 8 Apr 2020
Edited: Andrei Bobrov on 8 Apr 2020
Variant:
ii = 2:8;
jj = -(6:12);
[j,i] = ndgrid(jj,ii);
debt = 132.4 - j(:) + i(:);
other
n = 7;
ii = (2:8)';
jj = -(6:12)';
debt = 132.4 - jj(kron((1:n)',ones(n,1))) + ii(kron(ones(n,1),(1:n)'));
Armando MAROZZI
Armando MAROZZI on 8 Apr 2020
great! Thanks a lot!

Sign in to comment.

More Answers (0)

Categories

Find more on Loops and Conditional Statements in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!