split numbers separated by commas in a sub cell array into their own column

2019 11 30
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更新时间：2019 11 30
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I have a 18x1 cell array filled with numbers. Each cell of the array has a different size. How do I split each cell so there are no longer any subcells. I tried using cell2mat but since each column in the sub cell is of different size it did not work.
This is what the cell array looks like now
image.png
and this is what I am attempting to make it look like
image-1.png

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the cyclist
the cyclist 2019-11-30
Can you upload the variable in a mat file, using the paper clip icon? An image of the data is not useful for testing.
Ean Hendrickson
Ean Hendrickson 2019-11-30
here you go, I feel like it should be really simple but I have been struggling for a while with this.

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Adam Danz
Adam Danz 2019-11-30
编辑：Adam Danz 2019-11-30

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You were on the right track with cell2mat but first you have to pad the arrays so they are all equal length. Two of the three lines below use cellfun().
% Max number of elements within each vector
nMax = max(cellfun(@numel,section_2_1));
% Pad all cell elements with 0 so each cell element has equal length
x = cellfun(@(x)[x,zeros(1,nMax-numel(x))],section_2_1,'UniformOutput',false);
% Output matrix
m = cell2mat(x);

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Ean Hendrickson
Ean Hendrickson 2019-11-30
what exactly does the @ do in '@numel' and '@(x)'. I know numel finds number of elements, but I have not seen any documentation as to what the @ does
Adam Danz
Adam Danz 2019-11-30
@ creates an anonymous function. Cellfun applies that function to each element of the cell array.
Here's a different example of an anonymous function
f = @(a,b,c) a + b * c;
y = f(1,3,5)

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