[R] Cause of error message in cov function?

[Matthew Keller]

Hi all,

I have written a script in R that simulates genetically informative
data - it is posted on my website and available to the public. This is
my first time to write a script for use by others and am learning that
it isn't as easy as it seems.

To the issue. My script runs fine on my machine and on a server I have
access to, but a user has written me saying that it crashes the first
time the function "cov" is called up. Below is her error message
followed by the version of R she's using.

Can anyone help me out here? I can't recreate her error message. Does
anyone know what this might have to do with? Is it a version issue
(she's using R 2.1)? I'd appreciate any help!!

Matt


ERROR MESSAGE:

cov.varcomp <- cov(t(effects.cur[c("A","AA","D","F","S","E","AGE","AGE.by.A"),]*beta2))

there is an argument mssing.
error message:

Error in mean((a - mean(a)) * (b - mean(b))) :
       argument "b" is missing, with no default


SPECIFICS OF HER MACHINE:

> memory.size()
[1] 10985480
> R.Version()
$platform
[1] "i386-pc-mingw32"
$arch
[1] "i386"
$os
[1] "mingw32"
$system
[1] "i386, mingw32"
$status
[1] ""
$major
[1] "2"
$minor
[1] "1.0"
$year
[1] "2005"
$month
[1] "04"
$day
[1] "18"
$language
[1] "R"
> .Platform
$OS.type
[1] "windows"
$file.sep
[1] "/"
$dynlib.ext
[1] ".dll"
$GUI
[1] "Rgui"
$endian
[1] "little"
$pkgType
[1] "win.binary"

-- 
Matthew C Keller
Postdoctoral Fellow
Virginia Institute for Psychiatric and Behavioral Genetics