WHS wrote, "There were reports at one time that 2 or more rand() functions were random but very well correlated with each other. Has this been corrected?"
What is there to correct?
The rand() function is a deterministic function.? That is by design.? You give it an argument, and it converts it to a semi-random result.? It is not a random-sequence generator, like a linear-feedback-shift-register.? No, not like that.? Given the same argument x, rand(x) always returns the same result, every time.? That's how it should work, and that's how it does work.
The way to use two rand() functions in the same simulation and have them different, is to assure that their arguments are significantly different.? For example, use rand(time) and rand(-time).? Or rand(time+1e6).? Or rand(time*1e6).? Or something else.? Use your head to choose something that is different for each function's argument.
As another simple example, if one rand() function uses argument values between 1.0 and 1e9, make the second rand()'s argument go from 1e9 to 2e9.? Now the two functions generate a different sequence of semi-random values.
Andy
