Message-ID: <88EAF3512A55DF46B06B1954AEF73F7409E5C943@dc1ex2.air.org>
Date: 2005-08-29T19:49:20Z
From: Doran, Harold
Subject: Testing if all elements are equal in a vector/matrix
See ?identical
-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Vincent Goulet
Sent: Monday, August 29, 2005 3:35 PM
To: r-help at stat.math.ethz.ch
Subject: [R] Testing if all elements are equal in a vector/matrix
Is there a canonical way to check if all elements of a vector or matrix are the same? Solutions below work, but look hackish to me.
> x <- rep(1, 10)
> all(x == x[1]) # == operator does not provide for small differences
[1] TRUE
> isTRUE(all.equal(x, rep(x[1], length(x)))) # ugly
[1] TRUE
Best,
Vincent
--
Vincent Goulet, Associate Professor
??cole d'actuariat
Universit?? Laval, Qu??bec
Vincent.Goulet at act.ulaval.ca http://vgoulet.act.ulaval.ca
______________________________________________
R-help at stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html