I need to use the inverse chi square cumulative distribution as part of a bigger program to predict pass/fail criteria. MatLab has a great implementation of this function; however I would rather not have to rely on MatLab. The function in matlab is described here.
Personally, I can't imagine where I would start coding such a function. Actually I have very little knowledge of how it works. I just need to use it. I tried using the GNU Scientific library, but could not get it work with my compiler (I am using Visual C++ under Windows 2000, coding in C).
I was wondering if any one knows of a better suited library which I can install and use with my compiler, or perhaps if you have any recommendations about coding such a function, or if you have the code already and would not mind sharing.
Thanks in advance.