Lambert's W function.
Syntax
Y = lambertw(X)
Description
lambertw(X) evaluates Lambert's W function at the elements of X, a numeric matrix or a symbolic matrix. Lambert's W solves the equation
for w as a function of x.
Examples
lambertw([0 -exp(-1); pi 1]) returns
0 -1.0000
1.0737 0.5671
The statements
syms x y
lambertw([0 x;1 y])
return
[ 0, lambertw(x)]
[ lambertw(1), lambertw(y)]
References
[1] Corless, R.M, Gonnet, G.H., Hare, D.E.G., and Jeffrey, D.J., Lambert's W Function in Maple, Technical Report, Dept. of Applied Math., Univ. of Western Ontario, London, Ontario, Canada.
[2] Corless, R.M, Gonnet, G.H., Hare, D.E.G., and Jeffrey, D.J., On Lambert's W Function, Technical Report, Dept. of Applied Math., Univ. of Western Ontario, London, Ontario, Canada.
Both papers are available by anonymous FTP from
cs-archive.uwaterloo.ca
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