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?)
Thx!!!
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