<t>I'd personally respond with learn as much as you can - be it languages or packages. The most flexible IMO is R. You can transfer skill to S+, in case your firm likes to pay to license it.R is free.R has literally thousands of add on packages on CRAN. Like perl.R is interactive and at the same tim...

<r>R is my preference. Huge variety of statistical routines, as well as access (like most other languages) to compiled fortran or C/C++. It is more of a rapid development tool, and it certainly couldn't (at present) be used at production, but some very important quant people/firms I know use R on a ...

<r>jwmaiden,Not that many people care about fortran these days, but here is a link to what I think you want in f77 and f95.My code, free to use.<URL url="http://www.quantmod.com/fortran/nCr.fhttp://www.quantmod.com/fortran/nCr.f95Like"><LINK_TEXT text="http://www.quantmod.com/fortran/nCr.fht ... Cr....