Hi, I am new to Stata but am working through Ulrich
Kohler's Data Analysis using Stata to get to grip with
the software. One of the example:
.graph box income, over(emp) produces this error:
variable _box_sort not found
r(111);
or
variable _000006 not found in using data
r(111);
or
variable emp not found
r(111);
on different attempts to produce the graph.
I have also tried:
.sysuse auto, clear
.graph box mpg, over(rep78) which produces the same
errors.
This does not seems to have affected other graphic
commands e.g.
.scatter price weight produced the desired result.
I checked with -help graph-, where -graph box- seems
to be a valid command.
Would appreciate advice on the matter as to what went
on and what can be done.
Thank you in advance,
Liz
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