[R] Modified Bessel Function - 2nd kind

[Ravi Varadhan]

Hi Andrew:

There is the "besselK()" function in the base distribution.  This is 
exactly the Modified Bessel's function of the Second Kind. You don't 
need to write this in terms of I.0 and I.1.

Ravi.

----- Original Message -----
From: Dr Andrew Wilson <eia018 at comp.lancs.ac.uk>
Date: Wednesday, December 11, 2002 5:55 am
Subject: [R] Modified Bessel Function - 2nd kind

> In order to fit a probability distribution proposed by Sichel 
> [Journal of
> the Royal Statistical Society. Series A (General), Vol. 137, 
> No. 1. (1974), pp. 25-34], I need a modified Bessel function of 
> the 2nd
> kind.  I notice that the base package of "R" only has modified Bessel
> functions of the 1st and 3rd kind.  Does a modified Bessel 
> function of the
> 2nd kind exist anywhere?
> 
> Many thanks,
> Andrew Wilson
> 
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