My solution resembles Fred Wolfe's. -levels-
lets up you put the numlist in a local
macro or you can pick up r(levels). Both
are explained in the on-line help. One key
detail is that -levels- was added to
official Stata after the release of Stata 8,
so the manuals do not help here and you
must -update- to get access to -levels-.
That said, I can't reproduce anything like
. global place var1[1]
. forvalues n = 2/38 {
global place $place " " var1[`n']
. }
. di $place
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
36 0 0
Without an evaluation, literal text such as "var1[1]"
will get added to the macro.
Nor can I see that
line y1 y2 y3 x1, xline(`$mymac')
could ever work!
Nick
[email protected]
Peter J. Burke
> I think I now have it with the code that Fred Wolfe suggested
> and then using
>
> Line y1 y2 y3 x1, xline(`$mymac')
>
> I can't say I always understand the use of the quotes, but
> this time it
> seems to work.
> >I am trying to create a numlist, perhaps using a macro, that
> contains
> >the non-zero entries from a particular variable. for example
> with data
> >like the following excerpt
> >
> >case id var1
> >...
> > 34. | 34 0 |
> > 35. | 35 0 |
> > 36. | 36 36 |
> > 37. | 37 0 |
> > 38. | 38 0 |
> > 39. | 39 0 |
> > 40. | 40 0 |
> > 41. | 41 0 |
> > 42. | 42 42 |
> > 43. | 43 0 |
> > 44. | 44 0 |
> >...
> >
> >I would like to create a numlist that contains "36 42" and omits the
> >0's. I have tried
> >
> >. global place var1[1]
> >. forvalues n = 2/38 {
> > 2. global place $place " " var1[`n']
> > 3. }
> >
> >. di $place
> >1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> >36 0 0
> >
> >but the global "place" does not actually contain the numbers, and I
> >cannot figure out how to omit the zeros with an ifcmd, which
> does not
> >seem to be allowed with global statements.
> >Does anyone have any suggestions?
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