## How to concatenate cells?

### Fabricio (view profile)

on 12 Mar 2013
Hello,
I have 2 cell matrices like <1*1150cell> one has 1000*2 matrix in each cell: xxp the other has 1000*4 matrix in each cell: xxq
I would like to have a one cell matrices of <1*1150cell> with each cell having 1000*6 matrix from the concatenating both matrices.
I have tried different approaches, and tried resorting with loops but was not able to do it.
for i=1:1150
xx{i}={[xxp{i} xxq{i}]};
end
This does not work there are other longer ways to go apparently. But provides an idea of the problem.

### Honglei Chen (view profile)

on 12 Mar 2013

I think you just need to do
for i=1:1150
xx{i}=[xxp{i}; xxq{i}];
end
Alternatively, you can do
xx = cellfun(@(x,y)[x;y],xxp,xxq,'UniformOutput',false);

Fabricio

### Fabricio (view profile)

on 12 Mar 2013
It seems not to work both ways, but thanks for the answer.

on 12 Mar 2013

Does this do what you are looking for?
A = repmat([1,2,3,4], 1000, 1);
B = repmat([5,6], 1000, 1);
C = {A};
D = {B};
CC = repmat(C, 1, 1115);
DD = repmat(D, 1, 1115);
XX = cellfun(@horzcat, CC, DD, 'UniformOutput',false)

Fabricio

### Fabricio (view profile)

on 12 Mar 2013
Thank you, indeed, it does the trick. Nice way to go

### Walter Roberson (view profile)

on 12 Mar 2013

One way would be
mat2cell( [cell2mat(xxp.'), cell2mat(xxq.')], ones(1,1150), 6) .'
But this uses for loops internally.

Fabricio

### Fabricio (view profile)

on 12 Mar 2013
It seems that it could work, but the .' at the end is not accepted It seems quite simple and straight forward though. Thanks anyways for your input