How to save vector output from for loop?

Question

Areeb Siraj 2019-3-30

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/453429-how-to-save-vector-output-from-for-loop

评论： Stephen23 2019-3-31

采纳的回答： madhan ravi

For i=1:10 A=[i i+1 i+2; i+1 i i+1; i+2 i+1 i]; end

Now I want to make a new matrix Such that it's first element is the output of loop's eleration and so on.

Like this B = [A1 A2 A3.....A10 ]

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Answer 1

madhan ravi 2019-3-30

1
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https://ww2.mathworks.cn/matlabcentral/answers/453429-how-to-save-vector-output-from-for-loop#answer_368241

在 MATLAB Online 中打开

Save it as a 3D matrix:

A=zeros(3,3,10); % pre-allocate
for k = 1:10
A(:,:,k)=[k k+1 k+2; k+1 k k+1; k+2 k+1 k];
end

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Areeb Siraj 2019-3-30

And if it has to be a 2D Matrix. Then

madhan ravi 2019-3-30

在 MATLAB Online 中打开

B=bsxfun(@plus,[0 1 2;1 0 1;2 1 0],(reshape(1:10,1,1,numel(1:10))));
reshape(B,3,[])

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Answer 2

Stephen23 2019-3-31

2
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/453429-how-to-save-vector-output-from-for-loop#answer_368297

编辑：Stephen23 2019-3-31

在 MATLAB Online 中打开

Much simpler without a loop:

>> A = toeplitz(1:3)+reshape(1:9,1,1,[])
A(:,:,1) =
   1   2   3
   2   1   2
   3   2   1
(:,:,2) =
   2   3   4
   3   2   3
   4   3   2
A(:,:,3) =
   3   4   5
   4   3   4
   5   4   3
... more pages here
A(:,:,9) =
    9   10   11
   10    9   10
   11   10    9
A(:,:,10) =
   10   11   12
   11   10   11
   12   11   10