Dear Professor, I apologize for not be so specific in my answer, but , you already have tried to make an script on mathematica?, Try it, but after all which are the variables or you can explain me further. Best Regards
As Amenosis said, Mathematica Wolfram provides astonishing features that will help you reproduce specific values or even graphicx.
If you don't have access or experience with Mathematica you can write your own code in any programming language using series evaluations of Gamma incomplete function ( I suppose that this is your problem) http://dlmf.nist.gov/8.8#E7
Thanks for the answers Amenosis Lopez and Dragos Palade. However, the complete function to simulate involving the mentioned function is in the attached file.