"cycle for" between matrix with a variable in the name
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Andrea
on 30 Oct 2024 at 11:13
Commented: Stephen23
on 30 Oct 2024 at 22:00
Hi;
I have a series of matrix like A1, A2....AN and i want to perform an operation like
for i=1:N
B=B+A"i"(:,2)
end
how do i have to format the A"i"(:,2) part?
thank you
1 Comment
Steven Lord
on 30 Oct 2024 at 12:57
Can you dynamically create variables with numbered names like A1, A2, A3, etc.? Yes.
Should you do this? The general consensus is no. That Discussions post explains why this is generally discouraged and offers several alternative approaches.
Accepted Answer
Shivam
on 30 Oct 2024 at 11:27
Hi Andrea,
Refer to the example implementation:
N = 5; % Example no of matrix
A = {A1, A2, A3, A4, A5}; % Cell array containing matrices
% Initialize B
B = zeros(size(A{1}, 1), 1); % Assuming all matrices have the same number of rows
% Perform the operation
for i = 1:N
B = B + A{i}(:, 2);
end
3 Comments
Voss
on 30 Oct 2024 at 14:34
A = zeros(size(B.C1,1),1);
for ii = 1:100
A = A + B.("C"+ii)(:,12);
end
Stephen23
on 30 Oct 2024 at 22:00
"...I am working with struct of the type B.C1, B.C2....B.C100"
Rather than forcing pseudo-indices into the fieldnames it would be simpler and more efficient to use actual indexing.
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