How to convert cell to matrix

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Ede gerlderlands
Ede gerlderlands 2013-7-16
评论： Tehmina Kakar 2018-7-18
I have a cell which is given by A= 1x13cell. I want to extract the contents of the cell into the form of a matrix of size (13 x number of points each cell containd) is this possible? The number of points in each cell varies. Can you help me with this?
  2 个评论
Jos (10584)
Jos (10584) 2013-7-16
I suggest you give a small example. For instance, if
C = {[1 2],[11 12 13]} % a cell array
how would you like the final matrix M to look like? Something like
1 2 NaN
11 12 13
?

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回答（3 个）

Jan
Jan 2013-7-16
编辑：Jan 2013-7-16
N = cellfun('length', C);
M = numel(C);
R = NaN(M, N);
for k = 1:M
R(1:N(k)) = C{k}; % Perhaps: reshape(C{k}, 1, [])
end
  1 个评论
Ede gerlderlands
Ede gerlderlands 2013-7-16
编辑：Ede gerlderlands 2013-7-16
Thank you for yor reply. But this gives me the whole nubers that are found in the cell in the decending order following rows. What I really want is the numbers per cell . That is 13 rows and what is found in them . Thank you

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David (degtusmc)
David (degtusmc) 2013-7-16
编辑：David (degtusmc) 2013-7-16
Look up cell2mat. The link for the documentation is below. I hope this helps
http://www.mathworks.com/help/matlab/ref/cell2mat.html
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Evan
Evan 2013-7-16
This will only work for cells arrays containing matrices of constant size in each array.
David (degtusmc)
David (degtusmc) 2013-7-18
That is true. I did not think about that. Thank you Evan.

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Jos (10584)
Jos (10584) 2013-7-17
编辑：Jos (10584) 2013-7-17
Here is a suggestion
C = {[1 2 ;3 4],[11 12 13].',100:106} % a cell array
% make sure all elements are column vectors
C2 = cellfun(@(x) reshape(x,[],1), C,'un',0) ;
M = padcat(C2{:})
PADCAT can be found here: http://www.mathworks.com/matlabcentral/fileexchange/22909-padcat

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