On Feb 19, 2011, at 5:47 AM, danielepippo wrote:
Hi,
I have two vector with the marginal distribution like this:
a
[1] -0.419 -0.364 -0.159 -0.046 -0.010 -0.002 0.000 0.000 0.000
b
[1] 0.125 0.260 0.270 0.187 0.097 0.041 0.014 0.004 0.001
How can I calculate the joint distribution with R?
Marginal distributions do not uniquely determine the joint
distribution, Furthermore, the first one doesn't even look like a
distribution or even a density. Densities are positive and CDFs range
from 0 to 1. (The second on could be a discrete density for some set
of values.) So you need to explain where those numbers come from and
why you think we should apply sort of "distributional" assumptions
about them.
--
David Winsemius, MD
West Hartford, CT
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