Ricardo Ovaldia <[email protected]> reports:
> The following piece of code causes my Stata 8 to crash
> running on Windox XP:
>
> . manova headroom trunk turn = price foreign, cont(price)
> . test foreign=0
>
> It happens everytime. Can anyone confirm this?
And several people confirmed it on various platforms.
Next executable update we will stop it from dumping core.
However, let me point out that
. test foreign=0
is not valid syntax after -manova-. -help test- points you to
-help manovatest- which says that
test [exp = exp] ...
where exp must have references to coefficients enclosed in
[eqno]_coef[] (or synonym [eqno]_b[]). eqno is either ## or
name. Omitting [eqno] is equivalent to specifying [#1]
Similar information is in the manuals.
Maybe the test you meant to perform was
. test _b[foreign[1]] = 0
or
. test [headroom]_b[foreign[1]] = 0
or
. test [trunk]_b[foreign[1]] = 0
or
...
Why foreign[1]? Use the -detail- option of -manova- to see the
underlying mapping of categorical variables. You can do this
after the fact with
. manova , detail
At the top of the output you will see a table showing the
mapping. In this case, the levels of foreign are refered to as 1
and 2 (the underlying values being 0 and 1).
Ken Higbee [email protected]
StataCorp 1-800-STATAPC
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