anne <[EMAIL PROTECTED]> writes: > Hello > > 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)
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