generate random number according a pdf

Hi, if I have a function f(x) that is a pdf, how can I generate random number according to the odf f(x)? This distribution probability is not know (is not gaussian, exponentially, exc...) but it is my own distribution.

Thanks, Chiara

[Ashish Uthama]

Have a look at http://en.wikipedia.org/wiki/Random_number_generation#Generation_from_a_probability_distribution and give the implementation a try. Post back here if you have trouble.