Message-ID: <C9CB5945.5A0A8%macqueen1@llnl.gov>
Date: 2011-04-13T20:49:19Z
From: MacQueen, Don
Subject: problem with all/all.equal
In-Reply-To: <BANLkTim9PfFYU6iy7_wL6=auyX6424a9GA@mail.gmail.com>
The help pages for identical() and all.equal() have information that will
make it clear why they don't do what you want.
In the meantime, I tend to use a construct such as:
length(unique(x))==1
But be careful if x is not a vector.
No doubt there are other ways.
-Don
--
Don MacQueen
Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550
925-423-1062
-----Original Message-----
From: Laura Smith <smithlaura937 at gmail.com>
Date: Wed, 6 Apr 2011 15:09:14 -0700
To: "r-help at r-project.org" <r-help at r-project.org>
Subject: [R] problem with all/all.equal
>Hi!
>
>In a function, I may have an instance in which all elements are equal.
>
>> x <- rep(1,5)
>>
>> x
>[1] 1 1 1 1 1
>> identical(x)
>Error in .Internal(identical(x, y, num.eq, single.NA, attrib.as.set)) :
> 'y' is missing
>> all.equal(x)
>Error in is.expression(x) : 'x' is missing
>>
>
>I don't care what particular value it is, I just want to know if they are
>all equal.
>
>What am I doing wrong, please?
>
>Thanks,
>Laura
>
> [[alternative HTML version deleted]]
>
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