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st: drop question
I want to drop row x-1, x, x+1 and x+2 if the variable 'class' on row x is >
0. It doesn't matter if class is > 0 on rows x+1 and x+2. How can I do this?
Morrison Hodges, MD
Professor Emeritus of Medicine
University of Minnesota
Minneapolis Heart Institute Foundation
The reasonable man adapts himself to the world; the unreasonable
man persists in trying to adapt the world to himself. Therefore, all
progress depends on the unreasonable man.
George Bernard Shaw (1856 - 1950)
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