How to make an array of matrix (of varying sizes)

Question

I'm trying to get to grips with matlab, so this question is more about syntax than anything else.

I want to create a vector (1xn) of matrices. The matrices are all possibly of different dimensions eg. matrix 1 = 4 x 5, matrix 2 = 5 x 6 etc.

I tried using a for loop, but I had the following error:

Subscripted assignment dimension mismatch.

You can use cell arrays

rahnema1
– rahnema1

2017-03-26 03:34:33 +00:00
Commented Mar 26, 2017 at 3:34 — rahnema1
– rahnema1, Commented Mar 26, 2017 at 3:34

Teddy Ort · Accepted Answer · 2017-03-26 07:00:16Z

1

You can store an array of matrices of different sizes as a cell array of matrices. Often you'll want to create these cell arrays dynamically using the arrayfun function which will do this for you if you set the UniformOutput option to 0.

Example:

cols = [4 5 6];
rows = [1 2 3];
A = arrayfun(@(i) zeros(rows(i),cols(i)),1:3,'UniformOutput',0);
A{:}

Outputs:

ans =

     0     0     0     0


ans =

     0     0     0     0     0
     0     0     0     0     0


ans =

     0     0     0     0     0     0
     0     0     0     0     0     0
     0     0     0     0     0     0

answered Mar 26, 2017 at 7:00

Teddy Ort

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