Lambert: Lambert's W function
Description
Lambert's W function as per the Gnu Scientific Library reference manual
section 7.23. These functions are declared in header file
gsl_sf_lambert.h
Usage
lambert_W0(x, give=FALSE, strict=TRUE)
lambert_Wm1(x, give=FALSE,strict=TRUE)
Arguments
- x
input: real values
- give
Boolean with TRUE
meaning to return a list of three
items: the value, an estimate of the error, and a status number
- strict
Boolean, with TRUE
meaning to return NaN
if status is an error
Examples
Run this codea <- runif(6)
L <- lambert_W0(a)
print(L*exp(L) - a)
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