Dear mailing list,
Why does the following code produce numerical results for x.pos.l, but NaNs for
x.neg.l?
x.pos <- function(tau.e, tau.c){
tau.e + ((-tau.e^3 + 3*tau.e^2*tau.c -
3*tau.e*tau.c^2 + tau.c^3)^(1/3))/(2*2^(1/3))
}
(x.pos.l <- x.pos(1, 2))
x.neg <- function(tau.c, tau.i){
tau.i + ((tau.c^3 - 3*tau.c^2*tau.i +
3*tau.c*tau.i^2 - tau.i^3)^(1/3))/(2*2^(1/3))
}
(x.neg.l <- x.neg(2, 3))
Many thanks for help,
Alrik
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