Re: st: Modifying the content of a macro

[Jeph Herrin <stata@spandrel.net>]

The -list- directive is not working because you substracting
a string rather than a macro. You can either store "length" in
a separate macro and then substract that in your statement #2, or
instead try

  local nolength = subinstr("`main'","length","",.)

hth,
Jeph

On 7/28/2010 3:11 PM, Thomas Speidel wrote:
> I am writing a loop to cycle through a number of models. For example,
>
> . sysuse auto
> (1978 Automobile Data)
>
> . local main mpg price weight
>
> . local adjust length gear_ratio turn
>
> . foreach c of local main {
> 2. local nolength: list adjust - "length"
> 3. logistic foreign `c' `adjust' if "`c'" != "weight"
> 4. logistic foreign `c' `nolength' if "`c'" == "weight"
> 5. }
>
> Which fails on the second model. How do I modify `adjust' so that the
> string "length" is removed from its content and applied to the second
> set of models? In a less automated fashion, I want:
>
> . logistic foreign mpg length gear_ratio turn
> . logistic foreign price length gear_ratio turn
> . logistic foreign weight gear_ratio turn
>
> Preferrably, in this order. Creating another macro without "length" is
> not ideal, because I am dealing with a much larger set of covariates.
> Thanks.
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