C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  The equivalent of normalpdf()?          C++Talk.NET Forum Index -> C++ language (comp.lang.c++) View previous topic :: View next topic   Author Message TogaKangaroo Guest Posted: Thu Jul 28, 2005 3:00 am    Post subject: The equivalent of normalpdf()? A question I'm sure has come up before, but does anyone know how to write/where to find the std for the equivalent of the normalpdf(X, mu, sigma) function in matlab? For anyone who does not know what that is it is the equivalent of finding the probability of X in a normal distribution with mean mu and standard deviation sigma? Back to top Victor Bazarov Guest Posted: Thu Jul 28, 2005 3:31 am    Post subject: Re: The equivalent of normalpdf()? TogaKangaroo wrote: Quote: A question I'm sure has come up before, but does anyone know how to write/where to find the std for the equivalent of the normalpdf(X, mu, sigma) function in matlab? If this question has come up before, you should be able to find the answer[s] to it on Google Groups (http://groups.google.com/) Quote: For anyone who does not know what that is it is the equivalent of finding the probability of X in a normal distribution with mean mu and standard deviation sigma? The Standard library doesn't have any probability functions. You should try finding a suitable library on the Web. See the archives on Google for the "Available C++ Libraries FAQ" posted here by Nikki Locke about monthly. Follow the link in that post. V Back to top Alf P. Steinbach Guest Posted: Thu Jul 28, 2005 3:48 am    Post subject: Re: The equivalent of normalpdf()? * Victor Bazarov: Quote: TogaKangaroo wrote: A question I'm sure has come up before, but does anyone know how to write/where to find the std for the equivalent of the normalpdf(X, mu, sigma) function in matlab? If this question has come up before, you should be able to find the answer[s] to it on Google Groups (http://groups.google.com/) For anyone who does not know what that is it is the equivalent of finding the probability of X in a normal distribution with mean mu and standard deviation sigma? The Standard library doesn't have any probability functions. You should try finding a suitable library on the Web. See the archives on Google for the "Available C++ Libraries FAQ" posted here by Nikki Locke about monthly. Follow the link in that post. Or just Google for a definition of the function. When I tried that the third Google hit gave a definition. Now just translate that to C++, which should be trivial since all that's needed is in the language and the standard library (header <cmath>), with one exception: you'll have to compute pi, e.g. from arc cos, but this can be done once at program startup. -- A: Because it messes up the order in which people normally read text. Q: Why is it such a bad thing? A: Top-posting. Q: What is the most annoying thing on usenet and in e-mail? Back to top red floyd Guest Posted: Thu Jul 28, 2005 4:18 am    Post subject: Re: The equivalent of normalpdf()? Alf P. Steinbach wrote: Quote: you'll have to compute pi, e.g. from arc cos, but this can be done once at program startup. Isn't M_PI included by reference from <math.h> via <cmath>? Back to top Jack Klein Guest Posted: Thu Jul 28, 2005 4:27 am    Post subject: Re: The equivalent of normalpdf()? On Thu, 28 Jul 2005 04:18:12 GMT, red floyd <no.spam (AT) here (DOT) dude> wrote in comp.lang.c++: Quote: Alf P. Steinbach wrote: you'll have to compute pi, e.g. from arc cos, but this can be done once at program startup. Isn't M_PI included by reference from <math.h> via <cmath>? There is no M_PI macro in either standard C or standard C++. An implementation cannot define this symbol in a standard header if invoked in strictly conforming mode. -- Jack Klein Home: http://JK-Technology.Com FAQs for comp.lang.c http://www.eskimo.com/~scs/C-faq/top.html comp.lang.c++ http://www.parashift.com/c++-faq-lite/ alt.comp.lang.learn.c-c++ http://www.contrib.andrew.cmu.edu/~ajo/docs/FAQ-acllc.html Back to top Alf P. Steinbach Guest Posted: Thu Jul 28, 2005 4:28 am    Post subject: Re: The equivalent of normalpdf()? * red floyd: Quote: Alf P. Steinbach wrote: you'll have to compute pi, e.g. from arc cos, but this can be done once at program startup. Isn't M_PI included by reference from <math.h> via <cmath>? It isn't standard but often exists. I don't any longer have an installation of the OP's compiler so can't check that. -- A: Because it messes up the order in which people normally read text. Q: Why is it such a bad thing? A: Top-posting. Q: What is the most annoying thing on usenet and in e-mail? Back to top TogaKangaroo Guest Posted: Thu Jul 28, 2005 9:04 am    Post subject: Re: The equivalent of normalpdf()? I'm sorry, but that is incredibly unhelpful...I've been trying...what did you search for to find pseudocode? A simple link would be real nice if you found it. Yes, I see the thing from codecogs, but I don't have an account there so it's really just taunting me...much like you are. Also, I certainly would try to find it in the forum but there's not exactly a phrase to search for is it? "normpdf" and "normal pdf" didn't give me anything, I'm lost after that. I'm sorry for reposting uninteresting questions but I figure that the veterans could easily redirect me and the subject could die off quickly. Back to top Free Bird Guest Posted: Thu Jul 28, 2005 9:34 am    Post subject: Re: The equivalent of normalpdf()? TogaKangaroo wrote: Quote: Also, I certainly would try to find it in the forum but there's not exactly a phrase to search for is it? "normpdf" and "normal pdf" didn't give me anything, I'm lost after that. Try normal probability distribution function. Back to top Alf P. Steinbach Guest Posted: Thu Jul 28, 2005 10:23 am    Post subject: Re: The equivalent of normalpdf()? * TogaKangaroo: Quote: I'm sorry, but that is incredibly unhelpful...I've been trying...what did you search for to find pseudocode? "normalpdf" Which gave a formula. Pseudocode is something else and irrelevant here. That wasn't so incredibly hard, was it? -- A: Because it messes up the order in which people normally read text. Q: Why is it such a bad thing? A: Top-posting. Q: What is the most annoying thing on usenet and in e-mail? 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