Branimir K. Hackenberger wrote: > > This is some interesting: > >> -8^(1/3) > > [1] -2 > >> x=(-8:8) > >> y=x^(1/3) > >> y > > [1] NaN NaN NaN NaN NaN NaN NaN > NaN > 0.000000 1.000000 > > [11] 1.259921 1.442250 1.587401 1.709976 1.817121 1.912931 2.000000 > So, can anybody explain this?! (Why is x[1]^(1/3)=y[1]=NaN, but > -8^(1/3)=-2?) >
Operator precedence. See R FAQ 7.33 Why are powers of negative numbers wrong? Berend -- View this message in context: http://r.789695.n4.nabble.com/cube-root-tp3455020p3455027.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
