H {LambertW} | R Documentation |
The Lambert W function W(z) is the inverse of this function: H(u) = u exp(u) = z.
H(u)
u |
a numeric vector of real/complex values. |
Returns z = u exp(u) for u in C. If u is a vector, so is z.
Georg M. Goerg
Goerg, G.M. (2009). “Lambert W Random Variables - A new class of skewed distribution functions”. Unpublished
H(0) W(0) H(10) W(H(10)) ## at the critical point z = -1, both branches give the same inverse. H(-1) W(H(-1)) W_1(H(-1)) ## going further to the left, the principal branch gives the 'wrong' solution; ## the non-principal must be used H(-10) W(H(-10)) W_1(H(-10))