Adding matrices

I have an m by m by n set of matrices and I want to add all of the matrices in the n dimension so I would end up with only one m by m matrix. I have tried several different ways to do this but I just cannot come up with a set of code that does the addition for any number of n matrices.

[Brett Shoelson]

What exactly do you mean by a set of matrices? Can you show the form of your data? Is this a cell array? Lots of separate variables?

Answer 1

[Mahmoud Hammoud]

a = rand(2,2,2); asum = sum(a,3);

asum is the sum along the 3rd dimension.

Answer 2

[Fangjun Jiang]

a=rand(2,3,4); b=sum(a,3)

b =

    2.8451    2.1572    1.6369
    1.9019    0.9626    2.0225

Is this what you want?

The trick is to read the help of sum()