[R] multiple selection syntax

anne anne.piotet at urbanet.ch
Mon Sep 8 17:57:32 CEST 2003


This is a very newbie question on R syntax, but I do not find the answer....

I want to make a selection on an interval say choose Xint in the 
interval of temperatures 390-399

I tried this syntax
Xint<- X[t>=390 && t< 400] 
typing >XintI get the answer numeric(0)

it did not select any object! 'though I verified that there indeed are 
occrencies of X in this interval

Any idea?



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