[R-SIG-Finance] Imaginary root / complex number in a Gamma function

[Maheshwari, Dhruv]

This question is not directly finance-related, and is better suited for R-help.

But to quickly answer your question: see packages fAsianOptions and gsl. cgamma in the former, and you'll need to read the documentation more closely for the latter (try ?gsl::gamma)

- Dhruv

-----Original Message-----
From: r-sig-finance-bounces at r-project.org [mailto:r-sig-finance-bounces at r-project.org] On Behalf Of Mishuk.Chowdhury at tdameritrade.com
Sent: Tuesday, February 21, 2012 17:23
To: r-sig-finance at r-project.org
Subject: [R-SIG-Finance] Imaginary root / complex number in a Gamma function

Hi all,

I am trying to calculate the value of a gamma function with a complex number.

I'm getting this error:

> testfunc = function(d,z)
+ {
+   gamma(complex(real = d, imaginary = z)) }
>
> testfunc(1,2)


Error in gamma(complex(real = d, imaginary = z)) :
  unimplemented complex function



Is there a package that allows complex numbers within Gamma functions? Any other alternatives?

Thanks!

-Mishuk




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