[Rd] Im() of negative non-complex numbers is pi (PR#8272)

From: <davison_at_uchicago.edu>
Date: Tue 01 Nov 2005 - 21:12:30 GMT


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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https://stat.ethz.ch/mailman/listinfo/r-devel Received on Wed Nov 02 08:21:03 2005

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