Am Montag, den 07.07.2008, 01:59 -0300 schrieb
[email protected]:
> It is not rare for me to write Stata programs and face problems like the
> one just mentioned below. I will be very grateful for any expert opinion.
...
> */------------------------------start--------------------------------
>
> capture program drop example
> *! example v1. TVP 2008
> program define example, rclass byable(recall) sortpreserve
> version 9.0
> syntax [varlist], LOCI(integer) MEANS(real) SDS(real) ORS(string) K(real)
> MODEL(string) pa(string) INCREMENT(real)
>
>
> scalar n_x = 100000
> scalar PREV = "`k'"
> scalar affected = PREV*n_x
>
>
>
> end
>
> */------------------------------end--------------------------------
>
>
> . example, means(100) sds(1) ors(1.2,1.3,1.5) loci(4) k(0.3)
> model(genetic_stuff) pa(0.4) increment(0.000001)
> type mismatch
> r(109);
>
> If I delete the last line:
>
> scalar affected = PREV*n_x
>
> the program works fine.
Because of the quotation marks, you have stored the real number `k' as a
string in the scalar PREV. You can do that, but then you cannot multiply
this string with a real number, as you try to do in the next line. The
following code should work
scalar PREV = `k'
scalar affected = PREV*N_x
or even
scalar affected = `k'*N_x
Hope this help
Uli
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