On Nov 16, 2009, at 11:54 PM, sdlywjl666 wrote:

Dear All,
  How to do band-pass filters,low-pass filters,high-pass filters in R?
Thanks!

?RSiteSearch

(Learn to do your own searching.)

> RSiteSearch("bandpass filter")

23 hits... for example...

http://finzi.psych.upenn.edu/R/library/mFilter/html/bwfilter.html


> RSiteSearch("Butterworth, Chebyshev")

http://finzi.psych.upenn.edu/R/library/Rsac/html/iir.html

--
David.

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