Recent content by ncp1044

Perhaps I should buy a book on it. It sounds like a pretty dense topic. Thanks for pointing me in the right direction.

Can you expound on "If you have control for the threads..."? I can't say I know anything about parallel processing either...

To Mathmate: Thanks! That's much better, and it's all accurate. And I'm using Force2.0, a freebie that I found on download.com. To Hurkyl: The reason for the error makes sense now. And thanks for the heads-up, I feel stupid now haha. rIEmann. Edit: What would it take to do this in parallel?

Here is my code. It seems to work except two things. When the number of subintervals is around 2,000,000 or greater, it starts to slowly diverge from pi. Also, at 15,000,000 the sum equals 4, and at around 17,000,000 it doesn't return an answer. I'm trying to use 40,000,000 subintervals and...

So I'm writing a program to do a riemann sum. The final answer should be Pi. My function: f(x) = 4/(1+x^2) a = 0 b = 1 n = 40,000,000 For a riemann sum, delta x = (b-a)/n so (1-0)/40,000,000 = 1/40,000,000. Then the riemann sum looks like...

I haven't even tried to write the program yet because I don't know anything about programming. I have yet to take a programming course.

I understand the calculus part of the problem; I just need help with the programming part. I can do the differentiation and I know how to do a Riemann Sum by hand, assuming that the number of intervals is small. I'm no good at programming so if anyone knows, some help would be appreciated.

My assignment: Solve for pi using a Riemann Sum with n= 40,000,000. The function is the antiderivate of 4/(1+x^2) dx. The bounds are from 0 to 1. Solving this gives you pi. Anyone know how to do this? Preferably with fortran77?