How to use svd in cellfun?

Question

Xh Du 2017-1-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/319189-how-to-use-svd-in-cellfun

评论： Adam 2017-1-5

采纳的回答： Adam

在 MATLAB Online 中打开

Hello,

I'd like to use svd in cellfun. Imagine a multidimensional cell like this:

inst = cell(1, 3, 5, 2);
inst(:,:,1,1) = 
    [308x21 double]    [308x21 double]    [308x21 double]

Each element of inst is a 308*21 double. Now I'd like to apply SVD on each element of inst to extract the singular values, so I write this:

instsvd = cellfun(svd, inst, 'UniformOutput', false);

MATLAB gives me error:

Error using svd
Not enough input arguments.

Any idea how to solve this?

Many thanks!

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Answer 1

Adam 2017-1-5

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/319189-how-to-use-svd-in-cellfun#answer_249484

编辑：Adam 2017-1-5

在 MATLAB Online 中打开

instsvd = cellfun(@(x) svd(x), inst, 'UniformOutput', false);

The first argument to cellfun should be a function handle, you are passing the name of a function instead, with no arguments. The above should work and is using an anonymous function where 'x' is a placeholder for each of the elements of your cell array in turn.