We have done it, thanks very much! 2010-03-13
Randel å件人: Yihui Xie <x...@yihui.name> åéæ¶é´: 2010-03-12 22:48 主 é¢: Re: [R] rmaxwell in C æ¶ä»¶äºº: çæ°å½ª <try...@163.com> æ é: r-help <r-help@r-project.org> The manual R-exts, section 6.7.1 should help if you want to call rgamma() in C. Regards, Yihui -- Yihui Xie <xieyi...@gmail.com> Phone: 515-294-6609 Web: http://yihui.name Department of Statistics, Iowa State University 3211 Snedecor Hall, Ames, IA 2010/3/12 xie <x...@yihui.name>: > rmaxwell() depends on rgamma(), so what you actually need is to download R > source (rgamma() might depend further on other functions, though). > >> library(VGAM) >> rmaxwell > function (n, a) > { > if (!is.Numeric(n, posit = TRUE, allow = 1)) > stop("bad input for argument 'n'") > if (any(a <= 0)) > stop("argument 'a' must be positive") > sqrt(2 * rgamma(n = n, 1.5)/a) > } > <environment: namespace:VGAM> > > Regards, > Yihui > -- > Yihui Xie <xieyi...@gmail.com> > Phone: 515-294-6609 Web: http://yihui.name > Department of Statistics, Iowa State University > 3211 Snedecor Hall, Ames, IA > > > > On Fri, Mar 12, 2010 at 12:18 AM, çæ°å½ª <try...@163.com> wrote: >> Hi R useRs: >> >> How can I generate a random sample from Maxwell Distribution in C language? >> Since I know the function rmaxwell {VGAM}, I tried the function r2c {r2c}. >> But I still cannot find the source code. >> >> Thanks for your kind help. >> >> RegaRds, >> >> 2010-03-12 >> >> >> >> Randel >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> > > [[alternative HTML version deleted]]
______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
