save all columns into a new variable in a loop

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fadams18
fadams18 2020-4-15
评论： Stephen23 2020-4-15
I have the following setup. Every time k changes i get new values of T.
T is of size 1x1000, so i want to end the end have a 3x1000 matrix.
for k =1:3
T = myfunc( X, r)
end

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Stephen23
Stephen23 2020-4-15
Use indexing:
T = nan(3,1000); % preallocate!
for k = 1:3
T(k,:) = myfunc(X,r);
end
  2 个评论
fadams18
fadams18 2020-4-15
Funny thing i just did it. haha thanks though. I was doing T(:,k) and i just switched it and it worked. I really need to master indexing of matrices/vectors
Stephen23
Stephen23 2020-4-15
"I really need to master indexing of matrices/vectors"
Yes. Efficient indexing of arrays, matrices, and vectors is really one of MATLAB's key strengths.

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