I am not sure why this didn't work. Using the auto data set, the comparable
commands would be
twoway (scatter mpg weight if fore == 0) ///
(qfit mpg weight if fore == 0) ///
(scatter mpg weight if fore == 1 ) ///
(qfit mpg weight if fore == 1)
which works fine for me.
However, like your example, this returns an error:
twoway (scatter mpg weight if fore == 0 || qfit mpg weight if fore == 0) ///
(scatter mpg weight if fore == 1 || qfit mpg weight if fore == 1)
0| invalid name
invalid syntax
r(198);
Though if we do just one set of -twoway (scatter...|| qfit...)- it works.
Again, I think the problem binding () and separating ||. Either notation
works, but combining doesn't seem like a good idea.
When it gets to capture -noi .Graph : .twowaygraph_g.new- (-set trace on-
for all the details) it appears the outer set of parentheses is stripped.
So
twoway (scatter mpg weight if fore == 0 || qfit mpg weight if fore == 0)
becomes essentially -twoway scatter... || qfit...- :
= capture noi .Graph : .twowaygraph_g.new scatter mpg weight if fore == 0 ||
qfit mpg weight if fore == 0
In this syntax:
twoway (scatter mpg weight if fore == 0 || qfit mpg weight if fore == 0) ///
(scatter mpg weight if fore == 1 || qfit mpg weight if fore == 1)
there are no outer parentheses
= capture noi .Graph : .twowaygraph_g.new (scatter mpg weight if fore == 0
|| qfit mpg weight if fore == 0) (scatter mpg weight if fore == 1 || qfit
mpg weight if fore == 1)
0| invalid name
And so it is views each ( ) as one command.
Of course, none of the above may be correct, but it is how I read the log
file.
The moral seems to be don't try to bind() what should be separated||
Scott
> -----Original Message-----
> From: [email protected] [mailto:owner-
> [email protected]] On Behalf Of Branko Milanovic
> Sent: Thursday, February 10, 2005 3:35 PM
> To: [email protected]
> Subject: RE: st: Superimposing graphs
>
>
> Scott,
>
> Unfortunately, it does not work. What I find strange is that
>
> twoway (scatter capture lngdpppp if year==1988 & group==1 || qfit
> capture lngdpppp if year==1988 & group==1)
>
> Works quite fine. But if I repeat the same thing for another year (on
> the same figure) it does NOT work. But then if I take that another year
> and plot it alone (just to check if something may be wrong with it), the
> graph works again. O, it is only when they are together that the things
> do not work. (On a related note, it seems to me that the new twoway
> options have a fair number of bugs.)
>
> Best, b
>
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
