[R] two densities with same stepsize
Antje
niederlein-rstat at yahoo.de
Tue Feb 5 09:22:16 CET 2008
Hi there,
I have two series of data. plotting the density function of both gives me an
idea about the difference of the data. But I would like to quantify the
difference I see.
a <- rnorm(100)
b <- rnorm(100)
da <- density(a)
db <- density(b)
The problem is that da$x and db$x are different and so I have difficulties to
compare them... Is there any way to force the density funtion to produce the
values for the same x-steps?
Or is there any other statistical approach I should use for comparing two
density functions? I need to quantify how much the data-series differ (density
function is rather complex in my case with skew and several maximas, so not
easily to describe as a mathematical function.
Sorry, I'm not that deep into statistics. Any comments / keywords on this is
welcome...
Antje
More information about the R-help
mailing list