# How to reduce the grid size of 3D matrix, (quarter of its original size)

5 vues (au cours des 30 derniers jours)
I have grid data, (X,Y,T) x=lon,y=lat,t=time. The size of the data is (281*321*60), which is 0.25*0.25 grid data. I want to make it 1*1 grid. The final result should be (71*72*60). Kindly help me to do this. I know, how to interpolate and increase the resolution, but no idea how to reduce the resolution and increase the grid size. Thank you.
##### 0 commentairesAfficher -2 commentaires plus anciensMasquer -2 commentaires plus anciens

Connectez-vous pour commenter.

### Réponse acceptée

Simon Chan le 27 Juil 2021
Suppose A is your data where size is (281*321*60), try the following:
[Ny,Nx,~] = size(A);
idx1 = 1:4:Ny;
idx2 = 1:4:Nx;
B = A(idx1,idx2,:);
Noticed that the size of the result, B is (71*81*60)
size(B)
71 81 60
##### 1 commentaireAfficher -1 commentaires plus anciensMasquer -1 commentaires plus anciens
Thank you dear Simon, it is perfectly working.

Connectez-vous pour commenter.

### Catégories

En savoir plus sur Cell 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