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Re: CUDA version of RANDOMN? [message #62005 is a reply to message #62004]

Fri, 15 August 2008 07:28

wlandsman
Messages: 743
Registered: June 2000

Senior Member

On Aug 15, 10:11 am, "hotplainr...@gmail.com" <hotplainr...@gmail.com>
wrote:
> Hey guys,
>
> I need to write a kernel to replace the IDL RANDOMN POISSON
>
> for loop
> for loop
> for loop
> c = data[x,y,b]
> if c gt 0.0 then begin
> n = RANDOMN( seedP, POISSON=c )
> endif else begin
> n = 0
> endelse
> data[x,y,b] = n
> endfor
> endfor
> endfor
>
> Could someone point out an example code of how RANDOMN POISSON so that
> I can implement it in CUDA?

Your best bet is to probably look at the Poisson generating algorithm
in "Numerical Recipes in C" if you are going to implement it CUDA.

I have implemented the "Numerical Recipes in C" algorithm into the IDL
procedure poidev.pro at http://idlastro.gsfc.nasa.gov/ftp/pro/math/poidev.pro.
Although poidev.pro is normally slower than calling randomn(POISSON=),
it has advantages for just the problem you describe, which can be
written as simply

data = poidev(data)

rather than using a triple FOR loop. --Wayne

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[Message index]

		Re: CUDA version of RANDOMN? By: hotplainrice@gmail.co on Fri, 15 August 2008 17:58
		Re: CUDA version of RANDOMN? By: wlandsman on Fri, 15 August 2008 10:15
		Re: CUDA version of RANDOMN? By: wlandsman on Fri, 15 August 2008 08:28
		Re: CUDA version of RANDOMN? By: hotplainrice@gmail.co on Fri, 15 August 2008 08:16
		Re: CUDA version of RANDOMN? By: hotplainrice@gmail.co on Fri, 15 August 2008 08:14
		Re: CUDA version of RANDOMN? By: wlandsman on Fri, 15 August 2008 07:28

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