This seems to refer to the command -surface- written by Adrian Mander
and published as entry gr39 in STB-51 in 1999.
If so, then
1. You can't use it in Stata without installing it first. Or possibly
you installed some of the program files but not all.
2. There is a much more up-to-date version of the -surface- package on
SSC which you should install using -ssc-.
. ssc inst surface, replace
However, within that package only -surface7- is good for Stata 8.2.
However, I don't see off-hand that -surface- is relevant to panel data,
but it depends on precisely what you want to do, which is not clear to
me.
Nick
[email protected]
Matthew Gobey
I am trying to use command gr39 on a panel data set.
Is this possible?
Is there an upper limit on the observations which the command can deal
with?
I only seem to get the opaque message:
xtlines not found
r(111)
The variables I am using do exits, and I have changed their order.
I have tried collapsing the data but this has not worked either.
I am using stat version 8,.2 if that is of relevance.
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