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
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David Winsemius, MD
West Hartford, CT
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