Hi,
I think the following indicates a bug in Im().
> Im(-1)
[1] 3.141592653589793115998
> pi
[1] 3.141592653589793115998
> Im(0i-1)
[1] 0
> Im(-0.9876)
[1] 3.141592653589793115998
> Im(-987654321)
[1] 3.141592653589793115998
> Im(1)
[1] 0
> is.complex(-1)
[1] FALSE
This is R 2.2.0; Im(-1) == 0 with R 2.2.1.
Thanks,
Dan
> version
_
platform i386-pc-linux-gnu
arch i386
os linux-gnu
system i386, linux-gnu
status
major 2
minor 2.0
year 2005
month 10
day 06
svn rev 35749
language R
Debian (stable) linux
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