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Re: st: Using Sample Command with Scalar Not Number


From   "Dr. Yu Chen" <profyuchen@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Using Sample Command with Scalar Not Number
Date   Mon, 21 Jan 2013 18:12:24 -0600

I was reading this thread and found it interesting. Since A is a
scalar (not a macro), what does `=A' do? More specifically, what does
the equal sign and the single quotes do?
Where can I find the documentation for this usage (i.e., the equal
sign and the single quotes)?
Thanks,

Yu Chen



On Sun, Jan 20, 2013 at 8:46 AM, Nick Cox <njcoxstata@gmail.com> wrote:
>
> sample `=scalar(A)', count
>
> will ensure that -sample- sees the value of scalar A because the
> evaluation
>
> = scalar(A)
>
> takes place before -sample- gets to work. See -help macro- under
> expansion_optr.
>
> The -scalar()- ensure no clash with variable names starting with "A".
>
> Nick
>
> On Sun, Jan 20, 2013 at 2:27 PM, Maisie Harris <mjh275@georgetown.edu>
> wrote:
> > I am running a loop of code in which I'd like to use the sample
> > command, but instead of stating the specific number I want to sample
> > I'd like to refer to a previously defined scalar.
> >
> > A simplified version of what I'm trying to do is:
> >
> > scalar A=5
> > sample A, count
> >
> > However, when I run the code it says that it finds A when it is
> > expecting a number. Is there a simple way to do this? Do I need to
> > redefine the scalar somehow?
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