Radu Ban
>
> Thanks for the previous help.
> I have an income variable and I would like to create a set
> of dummies for
> whether the income is between certain percentiles (i.e
> inc10 for income b/w
> the 10th and 15th percentile and so on). I know that
> -centile- generates
> requested centiles, but I'm not sure how to put the results
> of this command
> into a list that can be used with the -egen cut- command.
I'm assuming there is some reason why -_pctile-
is irrelevant.
As reported previously, -egen, cut()-, as updated
on 9 August 2002, ignores values beyond the first
and penultimate arguments of -at()-. Thus if
you used it, you would need to apply corrective surgery
anyway.
Of various alternatives, writing your own code
is one possibility. Illustration: -mpg- in auto
data.
1. Calculate your percentiles
centile mpg , c(5 10 25 50 75 90 95)
2. Pick them up and put them in a comma-separated
list
local nc : word count `r(centiles)'
qui forval i = 1/`nc' {
local list "`list'`r(c_`i')',"
}
3. That list will end with a comma. We need
to add the maximum to the list:
su mpg, meanonly
4. Generate your classified variable
gen cmpg = recode(mpg,`list'`r(max)')
5. and thus the dummies:
tab cmpg, gen(cmpg)
Nick
[email protected]
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