# Real Values of the Lambert W Function 1.0

OS : Windows / Linux / Mac OS / BSD / Solaris

Script Licensing : Freeware

Created : Aug 27, 2007

Downloads : 6

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## The Lambert package contains a function (wapr) for ...

The lambert package contains a function (wapr) for calculating Real Values of the lambert W Function by D. A. Barry, as well as a test module for testing wapr against high precision results.

Note: The Symbolic Math Toolbox already contains Maple's implementation of the W function. The Maple version accepts complex arguments, and gives results for complex branch of W.

where

w = output, W(x);

nerror = error flag, 0 (no errors), or 1 (error);

x = argument of W;

nb = branch (0 for upper branch - default, anything else for the lower branch);

l ~= 1, argument x is actual value for which W is desired (default); = 1, argument x is positive offset from -exp(-1);

m = 1, print error/information messages, ~= 1, don't print anything (default).

Note: The Symbolic Math Toolbox already contains Maple's implementation of the W function. The Maple version accepts complex arguments, and gives results for complex branch of W.

**Syntax:**

[w, nerror] = wapr(x, nb, l, m);where

w = output, W(x);

nerror = error flag, 0 (no errors), or 1 (error);

x = argument of W;

nb = branch (0 for upper branch - default, anything else for the lower branch);

l ~= 1, argument x is actual value for which W is desired (default); = 1, argument x is positive offset from -exp(-1);

m = 1, print error/information messages, ~= 1, don't print anything (default).

**• MATLAB Release: R13**

**Demands:****Real Values of the Lambert W Function 1.0 scripting tags:**matlab mathematics, function, complex, default, argument, real values, lambert, lambert function, branch, wapr.

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