Various broader issues are raised by Lucy's post.
First, the Statalist default is to assume that
everyone is using the latest version of Stata.
(If not, then do say so.) On this basis, do
check out Mata for matrix calculations.
Second, starting from the archives is like
deciding how to live one's life from the
contents of problem pages. You will learn a lot, and
most of the advice grows out
of judgement and experience, but -- here Stata is
different from life -- a better sequence is
to use online help, including -search- and -findit-,
and the manual.
In this case,
. search matrix row sum
points again to Mata functions.
Nick
[email protected]
[email protected]
> . matrix A=(1,2,3,4,5\6,7,8,9,10)
>
> . matrix C = J(5,1,1)
>
> . matrix B = A*C
>
> . matrix list B
>
> B[2,1]
> c1
> r1 15
> r2 40
Lucy Morecroft <[email protected]>
> 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
*
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