Cell arrays with a vector within a cell within a cell

Question

L'O.G. 2023-5-7

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评论： L'O.G. 2023-5-9

I have a cell array where each element consists of a 1 x 1 cell containing a vector of type double, i.e., C{1,1} contains a vector of length N.

How do I convert the inner cells from 1 x 1 cells into N x 1 cells where the entries correspond to each vector of length N? The N of each vector might be different.

I think the right way to do this is via cellfun but something like

C_out = cellfun(@(C_test) num2cell(C_test{1}), C_in, 'uniform',0);

does not quite get me there.

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Answer 1

Matt J 2023-5-9

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Maybe this is what you mean?

C_in={[1;2;3],[4;5],6}
C_in = 1×3 cell array
    {3×1 double}    {2×1 double}    {[6]}
n=max(cellfun('length',C_in));
C_out=num2cell(cell2mat( cellfun(@(x) cpad(x,n), C_in,'uni',0)  ) )
C_out = 3×3 cell array
    {[1]}    {[  4]}    {[  6]}
    {[2]}    {[  5]}    {[NaN]}
    {[3]}    {[NaN]}    {[NaN]}
function C=cpad(C,n)
 C(end+1:n,1)=nan;
end

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L'O.G. 2023-5-9

Yes, thank you!

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Answer 2

Walter Roberson 2023-5-7

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cellfun up a num2cell call.

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L'O.G. 2023-5-7

编辑：L'O.G. 2023-5-8

What does "cellfun up" mean? I think that's what I tried to do as I mention in my question.

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Answer 3

Matt J 2023-5-9

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https://ww2.mathworks.cn/matlabcentral/answers/1959479-cell-arrays-with-a-vector-within-a-cell-within-a-cell#answer_1232074

编辑：Matt J 2023-5-9

在 MATLAB Online 中打开

Is this what you mean?

C_in={{[1;2;3]},{[4;5]},{6}}
C_in = 1×3 cell array
    {1×1 cell}    {1×1 cell}    {1×1 cell}
C_out=[C_in{:}]
C_out = 1×3 cell array
    {3×1 double}    {2×1 double}    {[6]}