On Feb 15, 2010, at 8:08 AM, geir wrote:
Problem:
Based on a n x 2 data matrix i want a kernel estimate of the bivariate
density.
However, i also wish to specify wich points the density should be
calculated at.
I can offcourse just write the full kernel density estimate as a R-
code, but
surely there must already exist some package for this operation?
The package density(),
Where did you get said package? (I tried CRAN, BioC and R-Forge
without success.) Or are you perhaps confused about the difference
between functions and packages, as the use of "()" after a "package"
name might suggest??
Aside from that concern, try:
library(MASS)
?kde2D
Lets you determine the grid.
Or:
RSiteSearch("2D grid") # 153 hits with a fairly wide range of
potential solutions
seems to create a new matrix (depending on n), where
the density is estimated. But i dont know how to specify the points
for this
package.
--
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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