Dear All!
If I try to compare the attributes of two
objects, I find a surprising behaviour of
attr.all.equal(). With identical attributes I
receive the answert NULL. If the attributes
differ, the answer is as expecxted and differences are shown.
all.equal(attributes(), attributes()) instead
returns TRUE, if attributes are equal.
See example:
v <- 1:5
attr(v, 'testattribute') <- 'testattribute v'
v_c <- v
attributes(v)
$testattribute
[1] "testattribute v"
attributes(v_c)
$testattribute
[1] "testattribute v"
all.equal(v, v_c)
[1] TRUE
attr.all.equal(v, v_c)
NULL << - - - - - - - - - - here is, what I don't expected
all.equal(attributes(v), attributes(v_c))
[1] TRUE
attr(v_c, 'testattribute') <- 'testattribute v_c'
attr.all.equal(v, v_c)
[1] "Attributes: < Component 1: 1 string mismatch >"
all.equal(attributes(v), attributes(v_c))
[1] "Component 1: 1 string mismatch"
Thanks for your attention
Heinz Tüchler
Version:
platform = i386-pc-mingw32
arch = i386
os = mingw32
system = i386, mingw32
status = Patched
major = 2
minor = 8.0
year = 2008
month = 11
day = 04
svn rev = 46830
language = R
version.string = R version 2.8.0 Patched (2008-11-04 r46830)
Windows XP (build 2600) Service Pack 2
Locale:
LC_COLLATE=German_Austria.1252;LC_CTYPE=German_Austria.1252;LC_MONETARY=German_Austria.1252;LC_NUMERIC=C;LC_TIME=German_Austria.1252
Search Path:
.GlobalEnv, package:stats, package:graphics,
package:grDevices, package:utils,
package:datasets, package:methods, Autoloads, package:base
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