st: sum of rows in matrix

["Lucy Morecroft" <Lucy.Morecroft@trentcancer.nhs.uk>]

Hi Statalist,

Appologies if this is a very basic question, but a lengthy search of
the archives didn't answer my query.

How can I create a vector, where each element is the sum of each row in
a matrix A?

e.g. let,

mat A=(1,2,3,4,5\6,7,8,9,10)

mat list A

A[2,5]
    c1  c2  c3  c4  c5
r1   1   2   3   4   5
r2   6   7   8   9  10

I would like to create B where:

B[2,1]
    c1
r1  15
r2  40

Thanks in advance,

Lucy




                                        

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