complex numbers in library function (PR#1737)
alex.deckmyn@oma.be
alex.deckmyn@oma.be
Wed, 3 Jul 2002 14:25:59 +0200 (MET DST)
Full_Name: Alex Deckmyn
Version: 1.5.1
OS: Linux Mandrake 7.0
Submission from: (NULL) (193.190.63.62)
A short function in a library contains the complex number -2i :
phihat <- function(x)
{
x+ (-2i)
}
If i read the source file with source("phihat") this works fine. If I include it
as
a function in a library and read it with library(test), the function is still
read corectly, but when I print it out it shows as
> phihat
function (x)
{
x + (-0+2i)
}
Internally R still uses (-2i) though:
> phihat(0)
[1] 0-2i
The problem only seems to occur when the function is part of a library.
When I read the same function via source:
> source("~/software/R-libs/test/R/test")
> phihat
function(x)
{
x+ (-2i)
}
Usually I work in emacs using ESS. When I edit the function phihat (Ctrl-C
Ctrl-d)
I get the bad representation and after reloading the function (ctrl-c ctrl-l)
the function has changed. quite a dangerous bug, I think, though I admit my
Linux
version is quite old.
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