Adding matrices

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Michael Joslin
Michael Joslin 2011-2-9
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.
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Brett Shoelson
Brett Shoelson 2011-2-9
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?

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Mahmoud Hammoud
Mahmoud Hammoud 2011-2-9
a = rand(2,2,2); asum = sum(a,3);
asum is the sum along the 3rd dimension.

更多回答（1 个）

Fangjun Jiang
Fangjun Jiang 2011-2-9
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()

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