That is essentially zero, because you are so far out in the left tail of the
distribution. So, you can ignore the negative sign and treat it as zero.
Ravi.
____________________________________________________________________
Ravi Varadhan, Ph.D.
Assistant Professor,
Division of Geriatric Medicine and Gerontology
School of Medicine
Johns Hopkins University
Ph. (410) 502-2619
email: rvarad...@jhmi.edu
----- Original Message -----
From: statfan <irene_vr...@hotmail.com>
Date: Sunday, March 27, 2011 1:06 pm
Subject: [R] pmt
To: r-help@r-project.org
> I am working with the pmt function in the {mnormt} package, and i am getting
> negative values returned. the following is an example of one of my outputs:
>
> pmt(x = c(3.024960, -1.010898), mean = c(21.18844, 21.18844), S =
> matrix(c(.319,.139,.139,0.319), 2, 2),df = 42)
> # -6.585641e-18
>
> Any help on why i'm getting negative numbers would be very much appreciated.
>
> THanks!
>
> --
> View this message in context:
> Sent from the R help mailing list archive at Nabble.com.
>
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>
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