R devel - Jul 2003 - abs() and negative output from fractions() (PR#3536)

Hi,

zeros is output from fractions()
>zeros
[1]   -2 -2/5    1  4/3
>abs(zeros)
[1]   -2 -2/5    1  4/3
>is.numeric(zeros)
[1] TRUE
>abs(zeros[1])
[1] -2
>as.numeric(zeros)
[1] -2.000000 -0.400000  1.000000  1.333333
>abs(as.numeric(zeros))
[1] 2.000000 0.400000 1.000000 1.333333
>version
         _
platform i386-pc-mingw32
arch     i386
os       mingw32
system   i386, mingw32
status
major    1
minor    7.1
year     2003
month    06
day      16
language R

graham lawrence

On Wed, 23 Jul 2003 forporphyry@hotmail.com wrote:
> Hi,
>
> zeros is output from fractions()
>
> >zeros
> [1]   -2 -2/5    1  4/3
> >abs(zeros)
> [1]   -2 -2/5    1  4/3
> >is.numeric(zeros)
> [1] TRUE
> >abs(zeros[1])
> [1] -2
> >as.numeric(zeros)
> [1] -2.000000 -0.400000  1.000000  1.333333
> >abs(as.numeric(zeros))
> [1] 2.000000 0.400000 1.000000 1.333333
Why is this a bug?


	-thomas


Thomas Lumley			Assoc. Professor, Biostatistics
tlumley@u.washington.edu	University of Washington, Seattle

On Wed, 23 Jul 2003 00:49:05 +0200 (MET DST), you wrote:
>Hi,
>
>zeros is output from fractions()
>
>>zeros
>[1]   -2 -2/5    1  4/3
>>abs(zeros)
>[1]   -2 -2/5    1  4/3
The fractions() function is presumably the one from MASS; questions
about contributed packages (even recommended ones) should go to the
package maintainer.  They are not R bugs.

Duncan Murdoch