Is there a function in SAS that applies a Lambert W transformation to data?

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Contributor
Posts: 59

Is there a function in SAS that applies a Lambert W transformation to data?

There are a few transformations that can be useful in compressing the tails of extreme valued data. One is the inverse hyperbolic sine, for which there is a SAS function. Another is Lambert's W, Lambert W-Function -- from Wolfram MathWorld

R has a function for this transformation. In searching for it on SAS Support, it looked like the OR Reliability module might have some Gumbel-type proxy for it...but I couldn't find an explicit statement or confirmation of the existence of a function.

Anybody know if a Lambert's W function, and it's inverse, exists in SAS?

Grand Advisor
Posts: 9,576

Re: Is there a function in SAS that applies a Lambert W transformation to data?

Try to post it at SAS/IML Software and Matrix Computations

Rick might have some idea.

Contributor
Posts: 59

Re: Is there a function in SAS that applies a Lambert W transformation to data?

Thank you...I think I got the answer I needed to hear, just not the answer I wanted to hear...

SAS Super FREQ
Posts: 3,406

Re: Is there a function in SAS that applies a Lambert W transformation to data?

You can download a SAS/IML implementation of the Lambert W function. The function has two branches, so yo uneed to know which branch to use.

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