Thanks, I'll try that. What is the output of approxfun?

On Mon, Nov 23, 2009 at 1:03 PM, Greg Snow <Greg.Snow@imail.org> wrote:

> If the client is always right, then what do they need us for?
>
> If you need a function to reproducibly generate predictions, then use loess
> to generate a set of predictions for a reasonably dense set of x-values,
> then use approxfun or splinefun to create a function to interpolate for you.
>  Then this function can give the predictions for various x values.
>
> --
> Gregory (Greg) L. Snow Ph.D.
> Statistical Data Center
> Intermountain Healthcare
> greg.snow@imail.org
> 801.408.8111
>
>
> > -----Original Message-----
> > From: r-help-bounces@r-project.org [mailto:r-help-bounces@r-
> > project.org] On Behalf Of Thomas S. Dye
> > Sent: Monday, November 23, 2009 1:39 PM
> > To: Christian Miner
> > Cc: r-help@r-project.org
> > Subject: Re: [R] Loess Fit
> >
> > Thanks Christian.  The client is always right ...
> >
> > Tom
> >
> > On Nov 23, 2009, at 10:32 AM, Christian Miner wrote:
> >
> > > sorry, I don't. I have data that I can estimate, but my client wants
> > > to "What if..." 20 separate scenarios, and that requires a function.
> > >
> > > On Mon, Nov 23, 2009 at 12:22 PM, Thomas S. Dye <tsd@tsdye.com>
> > wrote:
> > > Hi Christian,
> > >
> > > Do you have a reference to a publication where this has been done?
> > >
> > > All the best,
> > > Tom
> > >
> > > On Nov 23, 2009, at 10:15 AM, Christian Miner wrote:
> > >
> > >> it's a tricky maneuver. When I finish the fit, the predict function
> > >> will give me the values, and I can smooth this out so it looks like
> > >> a nice non-linear equation. The last thing I need to do is find the
> > >> equation, knowing I know have the x and y values, as they will
> > >> relate to each other in a non-linear fashion.
> > >>
> > >> Matlab can do this, but I'd rather not go into that realm.
> > >>
> > >> On Mon, Nov 23, 2009 at 12:11 PM, Thomas S. Dye <tsd@tsdye.com>
> > >> wrote:
> > >> Hi Christian,
> > >>
> > >> I haven't seen an equation associated with a loess fit before.  Do
> > >> you have a reference to one of these?
> > >>
> > >> All the best,
> > >> Tom
> > >>
> > >>
> > >> On Nov 23, 2009, at 9:03 AM, Christian Miner wrote:
> > >>
> > >> I'm working on Loess fit models using R, once I have the fit
> > >> accomplished,
> > >> I'm looking to back-out the equation of the fitted non-linear curve,
> > >> wondering if there is a way to determine this equation in R? I've
> > >> been
> > >> looking but can't find any literature. For me, the graph of the
> > >> function is
> > >> great, but without the equation of the graph, I'm kinda dead in the
> > >> water.
> > >>
> > >> Christian Miner
> > >> 503-866-6977
> > >>
> > >>        [[alternative HTML version deleted]]
> > >>
> > >> ______________________________________________
> > >> R-help@r-project.org mailing list
> > >> https://stat.ethz.ch/mailman/listinfo/r-help
> > >> PLEASE do read the posting guide http://www.R-project.org/posting-
> > guide.html
> > >> and provide commented, minimal, self-contained, reproducible code.
> > >>
> > >>
> > >>
> > >>
> > >> --
> > >> Christian Miner
> > >> 503-866-6977
> > >>
> > >
> > >
> > >
> > >
> > > --
> > > Christian Miner
> > > 503-866-6977
> > >
> >
> >
> >       [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help@r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide http://www.R-project.org/posting-
> > guide.html
> > and provide commented, minimal, self-contained, reproducible code.
>



-- 
Christian Miner
503-866-6977

	[[alternative HTML version deleted]]

