1. hi,
I'm PhD student, in computer scienc.
I badly need to find directed random function. are there such functions?
i.e can I find a random function I can subject it to serve my goal.  2.

3. Didn't understand what you meant in the other thread where you asked this same question, don't understand it now. I googled "directed random function" and got nothing, presumably you did too? Are you looking for a function that picks random directions? Are you looking for a function that picks random functions? Are you asking about Pseudo Random Number Generators?  4. I'm guessing it involves an algorithm for random number generation.

In a purely mathematical form, you can come up with some crazy function that would produce outputs with no obvious pattern, especially involving trigonometric functions and moduli.

Is that what you mean? I'm not sure. Could you explain what you mean by "directed random function"?

Again, if you think it would be better, post this in the Computer Science section of the forum. But right now we're not sure what you're asking.  5. Originally Posted by wallaby Didn't understand what you meant in the other thread where you asked this same question, don't understand it now. I googled "directed random function" and got nothing, presumably you did too? Are you looking for a function that picks random directions? Are you looking for a function that picks random functions? Are you asking about Pseudo Random Number Generators?
I looked for directed random function, I found random function but not directed.
maybe because I'm not have strong background in math, I can not how formulate my query.
what I mean , i want function generate random values , but not quite random.
is pseudo random may useful for me?
I used PSO algorithm to optimize my problem, this algorithm has equation that has random values which affect solution

thanks  6. Do you want random numbers with different statistical distributions?

does this help: .NET random number generators and distributions - CodeProject®
Or this: Random Number Distributions - GNU Scientific Library -- Reference Manual  random function 