[Rd] Wierd problem comparing numeric values and list using == (PR#1073)

gregory_r_warnes@groton.pfizer.com gregory_r_warnes@groton.pfizer.com
Sat, 25 Aug 2001 04:08:04 +0200 (MET DST)

Under R 1.3.0 on Solaris and Windows NT  there seems to be a bug in == when
applied to elements of a list, particularly when one of the elements is of
mode integer:

	> list(1) == list(1)
	[1] FALSE
	> 1 == list(1)
	[1] TRUE
	> as.integer(1)==list(as.integer(1))
	[1] FALSE
	> as.integer(1)==list(as.double(1))
	[1] FALSE
	> list(as.integer(1))==list(as.integer(1))
	[1] FALSE
	> list(as.integer(1))==as.integer(1)
	[1] FALSE
	> list(as.double(1))==list(as.double(1))
	[1] FALSE

However, these cases work:

	> as.double(1)==list(as.integer(1))
	[1] TRUE
	> list(as.integer(1))==as.double(1)
	[1] TRUE

Replacing the bare integer/double with a vector constructed with c() doesn't
change the results, and comparing between vectors created with c() appears


--please do not edit the information below--

 platform = i386-pc-mingw32
 arch = x86
 os = Win32
 system = x86, Win32
 status = 
 major = 1
 minor = 3.0
 year = 2001
 month = 06
 day = 22
 language = R

Windows NT 4.0 (build 1381) Service Pack 5

Search Path:
 .GlobalEnv, package:ctest, Autoloads, package:base

Unless expressly stated otherwise, this message is confidential and may be privileged. It is intended for the addressee(s) only. Access to this E-mail by anyone else is unauthorized. If you are not an addressee, any disclosure or copying of the contents of this E-mail or any action taken (or not taken) in reliance on it is unauthorized and may be unlawful. If you are not an addressee, please inform the sender immediately.

r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-devel-request@stat.math.ethz.ch