"which" is wrong?
Troels Ring wrote:
Dear friends, R 2.0.1 on windows XP: TOT <- seq(0.01,1,by=0.01) which(TOT==0.06) # numeric(0) which(TOT>0.06) # [1] 6 7 8 etc which(TOT<0.06) #[1] 1 2 3 4 5 TOT[6] #[1] 0.06 TOT[6]==0.06 #[1] FALSE but TOT[5]==0.05 #[1] TRUE and which(TOT==0.05) # [1] 5 TOT looks as expected when printed, 0.35 and 0.36 behaves similarly I have tried on another machine with the same result - wonder what happens and whether this is as expected ?
It is expected: the 0.06 *calculated* by seq() is computationally a little bit different than the 0.06 you have typed - we are working with floating point calculations on a digital computer. See ?all.equal for help. Uwe Ligges
Best wishes Troels Ring, Aalborg, Denmark
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