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Searching for fast linear interpolation routine [message #8553]

Fri, 04 April 1997 00:00

Roger J. Dejus
Messages: 3
Registered: April 1997

Junior Member

Did someone write a fast linear interpolation routine for irregular one
dimensional arrays (monotonically ascending or descending abscissas)
similar in functionality to the INTERPOL.PRO routine from RSI?

The enclosed test code takes about 1.6 s on a DEC alpha (old = model
3000/400). In reality, the arrays I'm using are of course much larger
and the bottleneck is really in INTERPOL.PRO.

Regards, Roger Dejus. (dejus@aps.anl.gov).

PRO test6,x,y,xi,yi

x = findgen(1001)/1000.0*2.0*!pi
y = sin(x)
xi = findgen(10001)/10000.0*2.0*!pi

t = systime(1)
yi = interpol(y,x,xi)
print,systime(1)-t

END ; test6

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[Message index]

		Searching for fast linear interpolation routine By: Roger J. Dejus on Fri, 04 April 1997 00:00
		Re: Searching for fast linear interpolation routine By: David Crain on Mon, 07 April 1997 00:00
		Re: Searching for fast linear interpolation routine By: Roger J. Dejus on Mon, 07 April 1997 00:00
		Re: Searching for fast linear interpolation routine By: Christian Soeller on Sun, 06 April 1997 00:00
		Re: Searching for fast linear interpolation routine By: Christian Marquardt on Sat, 05 April 1997 00:00
		Re: Searching for fast linear interpolation routine By: Liam Gumley on Sat, 05 April 1997 00:00
		Re: Searching for fast linear interpolation routine By: paul on Wed, 16 April 1997 00:00

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