C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  how to generate random data for a normal distribution          C++Talk.NET Forum Index -> C++ language (comp.lang.c++) View previous topic :: View next topic   Author Message Yudan YI (OSU) Guest Posted: Thu Feb 24, 2005 4:52 am    Post subject: how to generate random data for a normal distribution I want to generate random data from a normal distribution, while I checked the functions, and I found rand(), which returns a pseudorandom integer between zero and RAND_MAX. I am not sure how to use this function to generate my random data from a normal distribution. Thanks Yudan Back to top James Rafter Guest Posted: Thu Feb 24, 2005 6:55 am    Post subject: Re: how to generate random data for a normal distribution This is not really a C++ question. But... Google 'Numerical Recipes'. There's a NR in C, C++, Fortran, etc. The C one is available online. but the C++ one is not. Chapter 7 of the C book will show you what you need to do this from scratch. Perhaps others can recommend libraries if you don't want to do that. Back to top Dietmar Kuehl Guest Posted: Thu Feb 24, 2005 9:24 am    Post subject: Re: how to generate random data for a normal distribution Yudan YI (OSU) wrote: Quote: I want to generate random data from a normal distribution, while I checked the functions, and I found rand(), which returns a pseudorandom integer between zero and RAND_MAX. I am not sure how to use this function to generate my random data from a normal distribution. Have a look at the random number generator library at Boost (<http://www.boost.org/>): this library supports several distributions and the random number generators also have a few other advantages of the typical standard library implementations of 'rand()'. A library with essentially this interface is also part of the standard library technical report which includes candidates for future standard library extensions. -- <mailto:dietmar_kuehl (AT) yahoo (DOT) com> <http://www.dietmar-kuehl.de/> <http://www.contendix.com> - Software Development & Consulting Back to top hautrub Guest Posted: Thu Feb 24, 2005 6:57 pm    Post subject: Re: how to generate random data for a normal distribution Hi, Is there any other links to random number generator? [email]kongyew (AT) w-manager (DOT) com[/email] Back to top rossum Guest Posted: Thu Feb 24, 2005 10:59 pm    Post subject: Re: how to generate random data for a normal distribution On 23 Feb 2005 22:55:40 -0800, "James Rafter" <jjr2004a (AT) yahoo (DOT) com> wrote: Quote: This is not really a C++ question. But... Google 'Numerical Recipes'. There's a NR in C, C++, Fortran, etc. The C one is available online. but the C++ one is not. Chapter 7 of the C book will show you what you need to do this from scratch. Perhaps others can recommend libraries if you don't want to do that. The C version is here: http://www.library.cornell.edu/nr/cbookcpdf.html Beware of the code style, it is a good example of the saying "A real programmer can write FORTRAN in any language." rossum -- The ultimate truth is that there is no Ultimate Truth Back to top Dietmar Kuehl Guest Posted: Fri Feb 25, 2005 10:07 am    Post subject: Re: how to generate random data for a normal distribution hautrub wrote: Quote: Is there any other links to random number generator? Probably but none that I'm immediately aware of without search the Internet. Well, you can look at the technical report on library extension at the standard C++ site but this is essentially the Boost library in a different namespace and, AFAIK, without a ready implementation. However, out of curiosity: what desires in random number generation leaves the Boost random number generator library unsatisfied? -- <mailto:dietmar_kuehl (AT) yahoo (DOT) com> <http://www.dietmar-kuehl.de/> <http://www.contendix.com> - Software Development & Consulting Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         C++Talk.NET Forum Index -> C++ language (comp.lang.c++) All times are GMT Page 1 of 1   Jump to: Select a forum C/C++----------------C LanguageC Language (Moderated)C++ Language (Moderated)C++ language (comp.lang.c++)C++ language, library and standards Non-English C/C++ Newsgroups----------------C++ (German)C++ (French)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.