[R] A Question on lowess() function

Prof Brian Ripley ripley at stats.ox.ac.uk
Thu Apr 10 22:21:29 CEST 2003

On Thu, 10 Apr 2003, Minghua Yao wrote:

> Thank you for your reply.
> I didn't find what I needed from the archieves. Maybe, I need to figure out
> how to search the archieves effectively.
> I used y<-x[!is.na(x)] to get rid of NA and NaN. But I don't know how to get
> rid of Inf.

That's not what you asked for, and is.finite() will do that (if you apply 
it to x as well).

> Also, is there more detailed info about loess() than help(loess)?

Look at the na.action parameter ..., as well as the references.

> Thanks.
> -MY
> -----Original Message-----
> From: Prof Brian Ripley [mailto:ripley at stats.ox.ac.uk]
> Sent: Thursday, April 10, 2003 1:38 PM
> To: Minghua Yao
> Cc: r-help at stat.math.ethz.ch
> Subject: Re: [R] A Question on lowess() function
> lowess was old-fashioned a decade ago: use loess.
> And this Q was answered about a week ago, so use the archives.
> On Thu, 10 Apr 2003, Minghua Yao wrote:
> > I want to use lowess(x, y) where x and y are vectors of length of 4000+.
> In
> > fact, x and y are log of some vectors. So, some of the elements are NaN.
> > lowess() can not take away those elements then do the fitting. It will
> give
> > the error message and do nothing.
> >
> > 1. Can anybody tell me how to get rid of those NaN's and use lowess()?
> > 2. How to get the LOWESS fitting values for any elements in x?

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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