Re: st: create local macros named after the values of a categorial variable

[Jeph Herrin <stata@spandrel.net>]

Will

  tab citycode, matcell(A) matrow(cities)

do what you want?


On 8/13/2010 8:47 AM, Oliver Jones wrote:
> Hi,
> thanks for all of the answers. Especially the detailed
> answer from Sergiy helped me very much.
>
> Here is a little more background information on the task
> I'm working on:
> I want to generate a matrix of frequencies.
> The idea is do just on loop over all my observations and
> increment the appropriate frequencies matrix entries.
>
> I need the locals named after the city codes as an index
> telling me in which row of my frequency matrix I need
> to increment the entries.
>
> The -collapse- command is not going to work for me because
> of its vast need of memory, see my post:
> "RE: st: RE: collapse is too memory demanding"
> from Tue, 27 Jul 2010.
> The workaround is working but is quite slow, it took about
> 20 hours to complete. That's why I'm thinking of a way to
> program more efficient.
>
>
> Kind regards
> Oliver
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