# Cell arrays with a vector within a cell within a cell

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L'O.G. on 7 May 2023
Commented: L'O.G. on 9 May 2023
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.

Matt J on 9 May 2023
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]}
C(end+1:n,1)=nan;
end
L'O.G. on 9 May 2023
Yes, thank you!

Walter Roberson on 7 May 2023
cellfun up a num2cell call.
L'O.G. on 7 May 2023
Edited: L'O.G. on 8 May 2023
What does "cellfun up" mean? I think that's what I tried to do as I mention in my question.

Matt J on 9 May 2023
Edited: Matt J on 9 May 2023
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]}

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