Re: st: RE: Utility to reduce vector length by a given number of elements

[Rachel <academicgirl@gmail.com>]

Thanks Nick, this works.  I was hoping for a one step command
(analagous to the   functionality for strings in your -renvars-
command) that did not involve computing the length, but apparently
this doesn't exist.

On 3/8/07, Nick Cox <n.j.cox@durham.ac.uk> wrote:
> You may not know the length, but Stata does, so
> does this suit?
>
> . matrix a = (1,2,3,4,5,6,7,8,9,10)
>
> . mat list a
>
> a[1,10]
>      c1   c2   c3   c4   c5   c6   c7   c8   c9  c10
> r1    1    2    3    4    5    6    7    8    9   10
>
> . local last  = colsof(a) - 5
>
> . matrix a = a[1, 1..`last']
>
> . mat list a
>
> a[1,5]
>     c1  c2  c3  c4  c5
> r1   1   2   3   4   5
>
>
> Nick
> n.j.cox@durham.ac.uk
>
> Rachel
>
> > Is there a Stata (rather than Mata) utility that will remove the last
> > n elements of a vector?  Is there some way of doing this without
> > explicitly without knowing (or evaluating) the length of the vector?
>
> *
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*
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