How to Save the outputs of my for loop?

Question

cestcandice 2017-4-19

0
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https://ww2.mathworks.cn/matlabcentral/answers/336173-how-to-save-the-outputs-of-my-for-loop

评论： cestcandice 2017-4-19

I have this code:

x=1:10;
for i=1:length(x);
    y=rand(i)
end

which is doing what I want to, but it's not saving the answers in my workspace, so I tried this:

x=1:10;
for i=1:length(x);
    y(i)=rand(i)
end 
 But that comes out with an error that says, "In an assignment  A(:) = B, the number of elements in A and B must be the same."

Thanks for the help..

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Answer 1

James Tursa 2017-4-19

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https://ww2.mathworks.cn/matlabcentral/answers/336173-how-to-save-the-outputs-of-my-for-loop#answer_263660

编辑：James Tursa 2017-4-19

在 MATLAB Online 中打开

rand(i) is going to create a different sized matrix for each iteration, namely a square matrix of size i x i. That's why you are getting the error. If this is really what you want, then you can use cell arrays. E.g.,

y{i} = rand(i);

If you are just trying to generate a single random number for each iteration, then

y(i) = rand;

Or in the latter case you could just get rid of the loop entirely with:

y = rand(size(x));