Re: st: parmby if=exp for strings

[Nick Winter <nw53@cornell.edu>]

THe problem here, I wager, is that you've got quotation marks within 
quotation marks, without using compound quotation marks.  This should work:

parmby `"stcox var1 var2 if inlist(var3, "string1", "string2")"'

Note the `" to begin the overall stcox command, and "' to end it.  This 
lets Stata know which open-quote goes with which close-quote.

-Nick Winter


At 10:41 AM 7/14/2004 -0700, you wrote:

> Hi,
>
> I am performing a series of parmby's for stcox analyses.  In my hands, I
> have found that _if_ only accepts numeric expressions:
>
> stcox var1 var2 if inlist(var3, "string1", "string2")
>
> works just fine, but
>
> parmby "stcox var1 var2 if inlist(var3, "string1", "string2")",
> saving(parms1.dta)
>
> does not work, I get the following error message:
>
> varlist not allowed
> r(101);
>
> However I can get around this problem by converting the string variable to a
> numeric one:
>
> encode var3, gen(var3_nu)
> parmby "stcox var1 var2 if inlist(var3_nu, 1, 2)", label eform
> saving(parms1.dta)
>
> works just fine
>
> Is there a general rule about the use of =exp for strings that I am not
> aware of?
>
> Thank you for your help!
>
> Cheers,
>
> Douglas
>
>
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