[R] rmaxwell in C

[Yihui Xie]

The manual R-exts, section 6.7.1 should help if you want to call rgamma() in C.

Regards,
Yihui
--
Yihui Xie <xieyihui at 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 <xie at 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 <xieyihui at 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, 王杰彪 <tryshy at 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]]
>>
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>>
>
>