Full_Name: Murray Smith
Version: 2.2.1
OS: Windows XP
Submission from: (NULL) (202.36.29.1)
order() will not allow a complex vector for its first argument. This contrasts
with sort() which will happily sort a complex vector.
While this may not be regarded as a bug by some, it is annoying for anyone who
makes frequent use of complex numbers.
The problem occured in the Windows version 2.2.1 of R, but it has been present
in earlier versions.
> version
_
platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status
major 2
minor 2.1
year 2005
month 12
day 20
svn rev 36812
language R
An example demonstrating the problem:
x <- rep(2:1, c(2, 2)) + 1i*c(4, 1, 2, 3)
> x
[1] 2+4i 2+1i 1+2i 1+3i
> order(x)
Error in order(x) : unimplemented type 'complex' in 'orderVector1'
However sort() works with complex arguments
> sort(x)
[1] 1+2i 1+3i 2+1i 2+4i
The problem can be worked around either by
> order(Re(x), Im(x))
[1] 3 4 2 1
or, because order() allows subsequent arguments to be complex, by using a
constant vector for the first argument
> order(numeric(length(x)), x)
[1] 3 4 2 1
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