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Hi Everyone,


I try to delete the middle 50% of observations by only keeping the 25% lowest (Q1) and 25% highest (Q3) observations. I tried to make Quartiles by proc by classification but when I select 4 quartiles, i don't know how to delete the middel 50% oberservations. Is there an easy way to do this or do i have to use excel for this.

Thanks in advance,

Thomaaatke

Not sure what you mean by "delete", but here's some code that NAs the middle out.

something like
smpl if y<quantile(y,.25) or y>@quantile(y,.75)

Thanks a lot!