Kit Baum indicated one good solution.
Another (old-style) solution (i.e. pre-Mata) is the -matselrc- program
published in STB-56. -search matrix- would have pointed to this.
For those not on Stata 9, this program remains good for Stata 6, 7 or 8.
The help file includes this example for reversing the rows of a matrix.
(to reverse the rows of a 4 X 5 matrix)
. matselrc B B, r(4/1)
A more interesting question is why Amadou reports
that his code doesn't do the job. Apart from not
moving the rownames too, it looks along the right
lines.
Nick
[email protected]
[email protected]
> I have a question on how to "transpose" a matrice.
> Suppose, I have the following matrice:
>
> B[5,1]
> .1
> .3
> .5
> .7
> .9
>
> I want to reverse it into:
>
> B[5,1]
> .9
> .7
> .5
> .3
> .1
>
> I've tried the following:
>
> local n = rowsof(B)
> forval i =1/`n' {
> local nu = `n' - `i' + 1
> scalar ele = el(B,`nu',1)
> mat A= nullmat(A) \ ele
> }
>
> But it is not giving me what I want.
> Any better idea?
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