Re: [Rd] package signal, function filter (PR#12752)

2008-09-09 Thread ripley 
Package 'signal' is not the responsibility of the R developers, so you 
need to follow the FAQ and report this to the maintainer, rather than 
clog up R-bgs with an inappopriate report.

You might find that R's own function filter() is better written.

The FAQ also asks you not to report on long obsolete versions of R.

On Tue, 9 Sep 2008, [EMAIL PROTECTED] wrote:

 Full_Name: Jeff Schenck
 Version: 2.6.2 (signal v. 0.5)
 OS: Windows XP
 Submission from: (NULL) (128.107.248.220)


 The filter function in the package signal does not properly handle 
 recursive
 filters with only two feedback taps.  I looked at the source code in filter.R.
 There is a line that says if (length(a)  2) that I think should have =. 
  I
 tried it that way and it seems to work fine.

 FYI...  My test filter was a DC notch:
  b - c(1, -1)
  a - c(1, -0.95)
  y - filter(b, a, x)

 Thanks,
 Jeff Schenck

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-- 
Brian D. Ripley,  [EMAIL PROTECTED]
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel:  +44 1865 272861 (self)
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Re: [Rd] package signal, function filter (PR#12752)

2008-09-09 Thread hadley wickham 
On Tue, Sep 9, 2008 at 2:30 AM,  [EMAIL PROTECTED] wrote:
 Package 'signal' is not the responsibility of the R developers, so you
 need to follow the FAQ and report this to the maintainer, rather than
 clog up R-bgs with an inappopriate report.

 You might find that R's own function filter() is better written.

 The FAQ also asks you not to report on long obsolete versions of R.

Perhaps if these frequently asked questions were actually displayed
on the bug reporting page people would notice them.

Hadley

-- 
http://had.co.nz/

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