Ernest Berkhout replied to Ronnie Babigumira
>
> >test avgspring = deltaspring
> >test avgcrsgpa = deltacrsgpa, accum
> >test avgfrstsem = deltafrstsem, accum
> >
> >and it is OK for a few variables, however, I need to do
> this for many more
> >variables so my question is, CAN THIS BE AUTOMATED (can i
> repeat myself
> >without running mad).
>
> local i=0
> foreach origvars of varlist spring crsgpa frstsem {
> if `i'==0 test avg`origvars' = avg`origvars'
> else test avg`origvars' = avg`origvars' , accum
> local i = `i' + 1
> }
>
> should do the trick I think.
A few minor variations on this theme follow. First,
fixing the typo:
local i=0
foreach origvars of varlist spring crsgpa frstsem {
if `i'==0 test avg`origvars' = delta`origvars'
else test avg`origvars' = delta`origvars' , accum
local i = `i' + 1
}
Second, this won't work unless
spring crsgpa frstsem
is actually a varlist, and that doesn't seem guaranteed.
foreach origvars in spring crsgpa frstsem {
should work.
Even more automation is possible. Let me assume that
there is an one-to-one matching between the -avg*-
and the -delta*-. How to get the suffixes -spring ...-
etc.?
foreach v of var avg* {
local V : subinstr local v "avg" ""
local suff "`suff'`V' "
}
Now build up the tests:
local i = 0
foreach s of local suff {
if `i++' == 0 test avg`s' = delta`s'
else test avg`s' = delta`s', accum
}
Note how the incrementation of local macro i
is performed in place.
Nick
[email protected]
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