How do you vertically concatenate the rows of a cell array consisting of vectors of numbers?

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L'O.G.
L'O.G. 2022-3-30
评论： Simon Chan 2022-3-30
I want to vertically concatenate the elements of a cell array so that, for example, an array that is 3 x 9 becomes 1 x 9. How do I do that? The following concatenates everything into one dimension, which isn't what I want:
vertcat(cellarray{:});
  2 个评论
the cyclist
the cyclist 2022-3-30
What you want to do is not clear to me. Can you upload the cell array (using the paperclip icon in the INSERT section of the toolbar), or perhaps just write code here to define an smaller (like 3x2) input, and what you expect the output to be?
The best method will likely depend on whether the cell elements are numeric, strings, character arrays, etc.
L'O.G.
L'O.G. 2022-3-30
编辑：L'O.G. 2022-3-30
Each element of the cell array contains an N x 1 vector where N is not necessarily the same for each vector and the elements of the vector are numbers with double precision.

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采纳的回答

per isakson
per isakson 2022-3-30
Ran in:
Example
m = magic(3);
m = [m,m,m];
cac = num2cell(m); % sample data
arrayfun( @(ix) vertcat(cac{:,ix}), [1:9], 'uni',false )
ans = 1×9 cell array
{3×1 double} {3×1 double} {3×1 double} {3×1 double} {3×1 double} {3×1 double} {3×1 double} {3×1 double} {3×1 double}
Is this what you look for?

更多回答（2 个）

Simon Chan
Simon Chan 2022-3-30
Tru the following:
cellfun(@(x) cell2mat(x),num2cell(a,1),'uni',0)
Walter Roberson
Walter Roberson 2022-3-30
Output = arrayfun(@(ColIdx) vertcat(YourCell{:,ColIdx}), 1:size(YourCell,2), 'uniform', 0);

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