Re: [R] 3dim histogram? <FB75CFC167F3D311B11D00A0CC20FB0E3734CF@nts7.oec.Uni-Osnabrueck.DE>; from dtrenkler@nts6.oec.uni-osnabrueck.de on Fri, Oct 05, 2001 at 11:45:25AM +0200

From: Jason Turner (jasont@indigoindustrial.co.nz)
Date: Sat 06 Oct 2001 - 07:03:54 EST

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Message-id: <20011006090354.B1194@camille.indigoindustrial.co.nz>

> I wonder if there is a package including a program to display a 3dim
> histogram.

Not histograms, but density estimates...

library(sm)
sm.density(...)

This is a non-parametric density estimate, and a rather
nice one too.

If you have Large data sets (note - capital-L large ;-)

library(KernSmooth)
bkde2d(...)

is much faster, as it uses binning and an fft or two.

I've used these with persp() to give nice visual stuff.

Cheers

Jason

-- 
Indigo Industrial Controls Ltd.
64-21-343-545
jasont@indigoindustrial.co.nz
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