It works indeed. Thank you, Nick. However, the -graph- command only
works with single quotes.
. graph twoway `"`scatter'"'
scatter ( is not a twoway plot type
r(198);
. graph twoway "`scatter'"
scatter ( is not a twoway plot type
r(198);
. graph twoway `scatter'
[graph is drawn]
Friedrich
On Wed, Apr 9, 2008 at 4:52 PM, Nick Cox <[email protected]> wrote:
> This works. I wouldn't rule out other solutions.
>
> sysuse auto, clear
> tostring rep78, replace
> local scatter ""
> levels rep78, local(rep78)
> foreach r of local rep78 {
> local scatter `scatter' (scatter mpg weight if rep78=="`r'",
> msize(large))
> }
> di `"`scatter'"'
>
> Note that once you come out of the loop, your local includes " ", so you
> do need
> c.d. quotes then. But I don't have a good explanation for why they are
> not essential
> within the loop. Perhaps the parser can see that the " " are embedded
> within the parens.
> Not sure.
>
> Nick
> [email protected]
>
> Friedrich Huebler
>
> I am trying to build up a -scatter- command with a -foreach- loop. I
> need additional quotes but do not know where to place them. The
> problem can be reproduced with the auto data.
>
> . sysuse auto, clear
> . tostring rep78, replace
> . local scatter ""
> . levels rep78, local(rep78)
> . foreach r of local rep78 {
> local scatter `"`scatter' (scatter mpg weight if rep78=="`r'",
> msize(large))"'
> }
> . di "`scatter'"
> (scatter mpg weight if rep78==Unknown function .", msize()
> r(133);
>
> As the error message shows, I need additional quotes somewhere. How do
> I have to edit the definition of the macro "scatter"? In the end, the
> macro should contain the following string, so that I can draw a graph
> with the command -graph twoway "`scatter'"-.
>
> (scatter mpg weight if rep78==".", msize(large)) (scatter mpg weight
> if rep78=="1", msize(large)) (scatter mpg weight if rep78=="2",
> msize(large)) (scatter mpg weight if rep78=="3", msize(large))
> (scatter mpg weight if rep78=="4", msize(large)) (scatter mpg weight
> if rep78=="5", msize(large))
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