splitting a matlab matrix into several equal parts

Question

I have a matrix of size 64500x17. It represents detected texton features that I have to use to find 5 centroids for kmeans.

What I need is:

Answer 1

You can use mat2cell and this oneliner

C = mat2cell(A, repmat(12900, 5, 1), 17);

The second parameter to mat2cell is the row split of the matrix.

Now C is a cell array:

C = 

[12900x17 double]
[12900x17 double]
[12900x17 double]
[12900x17 double]
[12900x17 double]

and the partial matrices can be accessed as

C{1} etc.