# How to divide a matrix into smaller matrices

60 Ansichten (letzte 30 Tage)
Juan Fidalgo am 29 Apr. 2015
Beantwortet: Guillaume am 29 Apr. 2015
I need to split up a 2x10,000 matrix into 40 matrices with 500 elements in each matrix. Also the 2x10,000 matrix is loaded from an excel file and the values should be kept in order. I've seen other people with this similar problem but they have random numbers in their matrices whereas i'm trying to keep them in their place. For example i want values 1-500 in the first one and so on in the order they are in from the original matrix.
##### 0 Kommentare-2 ältere Kommentare anzeigen-2 ältere Kommentare ausblenden

Melden Sie sich an, um zu kommentieren.

### Antworten (4)

Ken Atwell am 29 Apr. 2015
##### 0 Kommentare-2 ältere Kommentare anzeigen-2 ältere Kommentare ausblenden

Melden Sie sich an, um zu kommentieren.

Juan Fidalgo am 29 Apr. 2015
i did'nt really understand that answer. Could you explain the process?
##### 0 Kommentare-2 ältere Kommentare anzeigen-2 ältere Kommentare ausblenden

Melden Sie sich an, um zu kommentieren.

Jurgen am 29 Apr. 2015
A cell type can hold several matrices, so splitting your matrix should output a cell. Mat2cell has syntax that let's you carve up your matrix into any subshapes.
If the syntax is hard you might try downloading a user contributed function/file from the file exchange.
##### 0 Kommentare-2 ältere Kommentare anzeigen-2 ältere Kommentare ausblenden

Melden Sie sich an, um zu kommentieren.

Guillaume am 29 Apr. 2015
It's really not complicated. As others have said use mat2cell. The dimNdist arguments of mat2cell says how many rows, columns, pages, etc. go into each matrix.
For example, let's split your matrix into 40 along the columns and keep the 2 rows together:
m = rand([2 10000]); %for demo, replace with your own matrix
coldist = size(m, 2) / 40 * ones(1, 40); %split the number of columns by 40 and replicate 40 times.
splitmats = mat2cell(m, 2, coldist)
##### 0 Kommentare-2 ältere Kommentare anzeigen-2 ältere Kommentare ausblenden

Melden Sie sich an, um zu kommentieren.

### Kategorien

Mehr zu Multidimensional Arrays finden Sie in Help Center und File Exchange

### Community Treasure Hunt

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

Start Hunting!

Translated by