Effacer les filtres
Effacer les filtres

Extract matrices of a particular size

3 vues (au cours des 30 derniers jours)
ankit
ankit le 31 Mar 2015
Commenté : Hamza Ahmed le 19 Mar 2021
Suppose there a cell containing matrices of different sizes. How can I extract all the (1x16) matrices in the same order which was present in the cell and store them in a different cell?
  1 commentaire
LUI PAUL
LUI PAUL le 31 Mar 2015
try it
result=cat([1],cellData1{:,:}); %Converting celldata to double.

Connectez-vous pour commenter.

Réponses (3)

James Tursa
James Tursa le 31 Mar 2015
Modifié(e) : James Tursa le 31 Mar 2015
C = your cell array
DesiredSize = whatever; % e.g. [1 16]
Z = cellfun(@size,C,'UniformOutput',false); % get matrix sizes
X = cellfun(@isequal,Z,repmat({DesiredSize},size(Z))); % which ones match desired size
D = C(X); % Extract them into another cell array
  2 commentaires
Michael Haderlein
Michael Haderlein le 31 Mar 2015
In principle, yes, but it looks to me as if there's are more straight-forward way of getting X:
C={rand(3) rand(1,16) rand(1,9) rand(1,16)};
DesiredSize=[1 16];
X=cellfun(@(c) isequal(size(c),DesiredSize),C);
D=C(X);
Hamza Ahmed
Hamza Ahmed le 19 Mar 2021
Hello i wanna loop through this
lets just say i have a 1*78 cell array and each cell has matrix of 2 columns but different number of rows my question is that how will I extract all the matrices which have number of rows greter then 2 from that cell array? any help in this regard will be much appreciated Thankyou

Connectez-vous pour commenter.


Andrei Bobrov
Andrei Bobrov le 31 Mar 2015
[a,b] = cellfun(@size,C);
out = C(ismember([a;b]',[1,16],'rows'));

ankit
ankit le 31 Mar 2015
I tried
z=cellfun(@(x) length(x),new_cell); %displays the lengths of the matrices of the cell
pos=find(z==16);
now I can get positions of all the 1x16 matrices
  1 commentaire
Andrei Bobrov
Andrei Bobrov le 31 Mar 2015
No, e.g.:
>> C = {randi(20,4,4);randi(10,1,16);randi(20,1,16);randi(15,16,3)};
>> ii = cellfun(@length,C)
ii =
4
16
16
16
>>

Connectez-vous pour commenter.

Catégories

En savoir plus sur Matrices and Arrays dans Help Center et File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by