reshaping cell containing double arrays

Hi,

I have (as an example) the following cell array:

test =

    1×4 cell array

      [40×1 double]    [40×1 double]    [40×1 double]    [40×1 double]

I want test to be a 1 x 1 cell, containing the double arrays (from left to right) as one double array of dimension 160 x 1. reshape(test,[160,1]) does not work directly here. What can I do?

Answer 1

[KSSV]

test = cell(1,4) ;
for i = 1:4
    test{i} = rand(40,1) ;
end
iwant = cell2mat(test) ;
iwant = {iwant(:)} ;

[MiauMiau]

Is there no quicker way than looping?

[Guillaume]

The loop is only to build the demo data.

Answer 2

[Guillaume]

That's because what you want is not reshaping but a concatenation. (The matrices may not be contiguous in memory):

test = [test{:}]

[MiauMiau]

That is giving me a 40x4 matrix...?!

[Guillaume]

Oh yes, your vectors are column vectors. Concatenate them vertically then:

test = vertcat(test{:})

Answer 3

[KL]

test = cell2mat(test');

this?