Saving and manipulating iterating matrices.

Question

Zaharaddeen Hussaini 2018-7-15

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/410455-saving-and-manipulating-iterating-matrices

回答： Zaharaddeen Hussaini 2018-7-15

采纳的回答： Stephen23

在 MATLAB Online 中打开

Hello,

I am trying to store varying matrices in a variable.

I understand I can use cell array to store but cell array manipulations are not so straight forward and I have a lot manipulations that need to be done on the save x nested variable.For example:

count = 0
for i = 1:5
    for j = 1:3
        for k = 1:2
            A = rand(5:5);
            count = count+1;
            B{count} = A;
            s{count} = sum(sum(B{count}));
        end
    end
end
% 
% if s{:} >10
%     fprintf('Hello');
% end

So basically I know the commented section would not run. is there a way deconstruct the cell arrays and use all the contents as matrix?

Also, if use

...B(i,j) = A;

I can eliminate the problem. But I am trying to avoid that as well as I have a lot of nested loops involved. If I choose to use B(i,j..), the any suggestions on how deal with it more efficiently?

Thanks. Apologies if it is not clear. copying excerpts from the main code would be difficult as many functions and loops are there hence the example.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Stephen23 2018-7-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/410455-saving-and-manipulating-iterating-matrices#answer_328926

编辑：Stephen23 2018-7-15

在 MATLAB Online 中打开

You either need to use a loop (explicitly or implicitly using cellfun) or covert the cell array to a numerc array (which is easy using a comma-separated list), e.g. something like this:

if any([s{:}]>10)

https://www.mathworks.com/matlabcentral/answers/320713-how-to-operate-on-comma-separated-lists