(1) There are no lists here! You have numeric vectors, not lists. (2) The normal vector-recycling rules apply. It does 1 == 4, 2 == 5, 3 == 4, 4 == 5, 5 == 4, .... Try
1:10 == 5:4
[1] FALSE FALSE FALSE TRUE TRUE FALSE FALSE FALSE FALSE FALSE (3) For what you appear to want
x %in% 4:5
[1] FALSE FALSE FALSE TRUE TRUE FALSE FALSE FALSE FALSE FALSE is the way to get it. (4) It is better to read the reference manual or a good book or post to R-help if you don't understand what R is doing. See the section in the FAQ 9.1 What is a bug? R is a volunteer project, and bug reports take valuable time.
On Thu, 15 Nov 2001 Paul.White@dsto.defence.gov.au wrote:
Hello bug people, Version: platform = i686-pc-linux-gnu arch = i686 os = linux-gnu system = i686, linux-gnu status = major = 1 minor = 3.1 year = 2001 month = 08 day = 31 language = R is this a bug ? x <- 1:10 x==4:5 [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE Nothing said it should but nothing said it shouldn't . My expectation was that it would successively try each of the values in the list and or the result for each item in the x vector. ie it would pick out all the matches
of 4 or 5.
[1] FALSE FALSE FALSE TRUE TRUE FALSE FALSE FALSE FALSE FALSE Paul
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