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How to store strings in a matrix or table?

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Tmat
Tmat 2020-5-31
评论： Tmat 2020-5-31
Hi, I have some strings, say, 'a1',...,'a12', and I want to store them in a 3 by 4 matrix A so that
A(1,1)='a1',..., A(1,4)='a4', A(2,1)='a5',..., A(2,4)='a8',..., A(3,1)='a9',..., A(3,12)='a12'. So that then I have a matrix A of my strings, and I can copy its content into my excel table (this is really what I want to do in the end).
However, as I try to assign string value to matrix, I recieve the following warning:
Unable to perform assignment because the indices on the left side are not compatible with the size of
the right side.
Any suggestions? Thanks in advance!

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Ameer Hamza
Ameer Hamza 2020-5-31
编辑：Ameer Hamza 2020-5-31
If the end goal is to write these values in excel, the following will work (R2019a and later)
A = compose('a%d', reshape(1:12, 4, 3).');
writecell(A, 'file.xlsx')
However, in general, there is a difference in char array (single quotes) and string (double quotes) in MATLAB. So the correct syntax is
A(1,1) = "a1";
A(1,2) = "a2";
..

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