saving a matrix of each loop

Question

caroline bourn 2021-3-11

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/769117-saving-a-matrix-of-each-loop

评论： caroline bourn 2021-3-11

HELLO! i am trying to save a matrix on each loop.

i know this is simple syntax but it is not working for me. This is the code i have where i know there is a syntax error. it just keeps overriding the previous matrix.

while(fin)
        % made seperate matrix for the test 
        for i=1:length(pts)
            matrix = [x(next:pts(i,:)), y(next:pts(i,:)), test(next:pts(i,:))];
            next = pts(i);
        end
        if pts(i) == length(pts)
            fin = 0;
        end
       
        return 
end 

i then attempted to add this, and this is the error coming up.

test(i,:) = matrix;

Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.

i have attempted to use matrix{i} but that gives me a cell and i cant handle it the way i want to. none of the cell commands work...

i have also tried matrix(:,i) = [x(next:pts(i,:)), y(next:pts(i,:)), test(next:pts(i,:))];

Unable to perform assignment because the indices on the left side are not compatible with

the size of the right side.

Error in arrayplay (line 56)

matrix(:,i) = [x(next:pts(i,:)), y(next:pts(i,:)), num_step(next:pts(i,:))];

please help. im just about ready to cry.

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Answer 1

KSSV 2021-3-11

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/769117-saving-a-matrix-of-each-loop#answer_644607

在 MATLAB Online 中打开

You can save them into a cell as shown below.

iwant = cell([],1) ;  % initilize a cell array; 
while(fin)
        % made seperate matrix for the test 
        for i=1:length(pts)
            matrix = [x(next:pts(i,:)), y(next:pts(i,:)), test(next:pts(i,:))];
            next = pts(i);
            iwant{i} = matrix ;   % save into a cell 
        end
        if pts(i) == length(pts)
            fin = 0;
        end
       
        return 
end 