Hi, I found kde2d in the MASS packages return densities for the bivariate random varaibles.
I donot understand why each element of density Z is a 2*2 matrix. Why it is not a number. For example, a bivariate normula distribution given (x, y) will return a number, the density, not a matrix. Thanks Pat > Hi all: > > I can use the density() function to get the kernel density for given > observed data X with bandwidth. > > Is there a function in R that can take in two dimensional data(x, y) and > return a joint density based > on the bandwidth. Do I need to provide bandwith for x and then for y? > > Is the GRASS package > kde2d.G(x, y, h, G, reverse=reverse(G)) > > provide such function? > > Thanks > pat > > ______________________________________________ > [email protected] 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. > ______________________________________________ [email protected] 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.
