Joseph Coveney <[email protected]> asks:
> I'd like to be able to find the name of a macro that contains a given
> string. After -anova-, there is a list of ereturn macros that contain the
> name of the term in the model and the number assigned to the term
> by -anova-. I want to be able to do arithmetic on the scalars (sum squares
> and degrees of freedom) associated with that term's number by referencing
> the model's term.
>
> Example: Let's say -ereturn list- after -anova- shows
> . . .
> e(term_1) : "clinic"
> e(term_2) : "physician|clinic"
> . . .
>
> I would like to write a program with a syntax of, say,
>
> -satterthwaite clinic physician|clinic . . .-
>
> and have the program query -anova-'s ereturn macros in order to get the
> names of the macros corresponding to these terms. I can then parse the
> numerals from the macro names in order to look up the corresponding ereturn
> scalars, e(ss_1), e(df_1), e(ss_2), e(df_2), . . ., and do arithmetic on
> them.
>
> I've scanned through the ado-file for -test- (perhaps it's in -_test-), and
> looked at -help macros-, and its linked help files, but nothing jumped out
> at me. I can always use brute force to go through the list of ereturn
> macros in a loop, or concatenate their contents in-sequence (again, a loop)
> and use -posof-. But is there anything more direct?
I would use a loop. I think it is rare to have thousands of
terms in an ANOVA, so a loop should not be overly time consuming.
local i 1
local index 0
while e(term_`i') != "" {
if e(term_`i') == "`whatever'" {
local index `i'
continue, break
}
local ++i
}
if !`index' {
di as err "`whatever' not found in most recent anova"
exit 147
}
<... code that refers to e(df_`index') and e(ss_`index') ...>
Obviously replace `whatever' with whatever is appropriate for
your program. The -continue, break- inside the loop pops you out
of the loop as soon as the term is found (thus saving execution
time if the term is early in the list).
Ken Higbee [email protected]
StataCorp 1-800-STATAPC
*
* 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/
