reshaping cell containing double arrays

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MiauMiau
MiauMiau il 10 Ott 2017
Modificato: Guillaume il 10 Ott 2017
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?

Risposte (3)

KSSV
KSSV il 10 Ott 2017
Modificato: KSSV il 10 Ott 2017
test = cell(1,4) ;
for i = 1:4
test{i} = rand(40,1) ;
end
iwant = cell2mat(test) ;
iwant = {iwant(:)} ;
  2 Commenti
MiauMiau
MiauMiau il 10 Ott 2017
Is there no quicker way than looping?
Guillaume
Guillaume il 10 Ott 2017
The loop is only to build the demo data.

Accedi per commentare.


Guillaume
Guillaume il 10 Ott 2017
That's because what you want is not reshaping but a concatenation. (The matrices may not be contiguous in memory):
test = [test{:}]
  2 Commenti
MiauMiau
MiauMiau il 10 Ott 2017
That is giving me a 40x4 matrix...?!
Guillaume
Guillaume il 10 Ott 2017
Modificato: Guillaume il 10 Ott 2017
Oh yes, your vectors are column vectors. Concatenate them vertically then:
test = vertcat(test{:})

Accedi per commentare.


KL
KL il 10 Ott 2017
Modificato: KL il 10 Ott 2017
test = cell2mat(test');
this?

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