On Jul 11, 2011, at 3:36 PM, Sam Steingold wrote:

* David Winsemius <qjvafrz...@pbzpnfg.arg> [2011-07-11 15:32:26 -0400]:

On Jul 11, 2011, at 3:18 PM, Sam Steingold wrote:

I need this plot:
given: x,y - numerical vectors of length N
plot xi vs mean(yj such that |xj - xi|<epsilon)
(running mean?)
alternatively, discretize X as if for histogram plotting and plot mean
y
over the center of the histogram group.

It sounds as though you asking for smoothing splines with an adjustable
band width ... something that is very easy in R.

Unlikely. I do not need smoothing. I have far too many points far too
densely for splines to make much sense.

That in turn does not make sense (to me anyway.) Just narrow the bandwidth.

I just need the mean (with confidence bounds, if possible) over many
small intervals.

Also sounds easy to implement. Post an example. At the moment it is not clear if your intervals are disjoint or overlapping.

?findInterval   # may be useful or
?cut
?seq
?tapply


thanks.

--
Sam Steingold (http://sds.podval.org/) on CentOS release 5.6 (Final) X 11.0.60900031
http://www.PetitionOnline.com/tap12009/ http://honestreporting.com
http://camera.org http://thereligionofpeace.com http://pmw.org.il
Two psychics reading each other's minds will die from stack overflow.

David Winsemius, MD
West Hartford, CT

______________________________________________
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.

Reply via email to