hi all

why does R do this:

(-8)^(1/3)=NaN

the answer should be : -2

a silly question but i kept on getting errors in some of my code due to this
problem.

i solve the problem as follows:

say we want : (-a)^(1/3)

then : sign(a)*(a^(1/3)) works

but there has to be a simpler way of soing such a simple mathematical operation.

thanking you
/
allan

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