X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=R%2Fmrca.R;h=4583bae24ea9797dd4d1d11acb042b8a5e7ed1e7;hb=bfaeca35ec130110327a3bb7a1f0fe3b66076a95;hp=4464672c5a343ccbbe30a4efc9932daea1194256;hpb=c827059eeafc8cbe41c812b26979543ab287803e;p=ape.git

diff --git a/R/mrca.R b/R/mrca.R
index 4464672..4583bae 100644
--- a/R/mrca.R
+++ b/R/mrca.R
@@ -1,15 +1,15 @@
-## mrca.R (2006-10-12)
+## mrca.R (2009-05-10)
 
 ##   Find Most Recent Common Ancestors Between Pairs
 
-## Copyright 2005-2006 Emmanuel Paradis
+## Copyright 2005-2009 Emmanuel Paradis
 
 ## This file is part of the R-package `ape'.
 ## See the file ../COPYING for licensing issues.
 
 mrca <- function(phy, full = FALSE)
 {
-    if (class(phy) != "phylo") stop('object "phy" is not of class "phylo"')
+    if (!inherits(phy, "phylo")) stop('object "phy" is not of class "phylo"')
     ##    if (!is.rooted(phy)) stop("the tree must be rooted.")
     ## Get all clades:
     nb.tip <- length(phy$tip.label)