## how to find the sum of matrix?

### BANI tita (view profile)

on 17 Oct 2012

hello, I have a loop as results of K = 1:19, a matrix A (k), my question is how to find the sum (M )of all matrix for each value of k, ie: find M = sum(A (k))

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on 17 Oct 2012
Edited by Matt J

### Matt J (view profile)

on 17 Oct 2012

I'm assuming your matrices are the slices of a 3D array

```M=A(:,:,k)
```

If so, just do

```sum(A,3);
```

BANI tita

### BANI tita (view profile)

on 17 Oct 2012

yes my matrix dimension is 3, A (:,:, k)

BANI tita

### BANI tita (view profile)

on 17 Oct 2012

thank you very much

### PG (view profile)

on 17 Oct 2012

If I understand your question correctly:

sum_of_all_matrices = sum(A)

PG

### PG (view profile)

on 17 Oct 2012

For Example:

a1 = [1 2 3]; a2 = [1 2 3]; a3 = [1 2 3]; a123 = [a1 a2 a3]; sum_out = sum(a123);

sum_out is sum of elements of matrix

BANI tita

### BANI tita (view profile)

on 17 Oct 2012

thank you very much

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