Message-ID: <1277216146968-5208969.post@n2.nabble.com>
Date: 2010-06-22T14:15:46Z
From: amelie_can
Subject: RDA with only dummy variable in environmental matrix
In-Reply-To: <4C205DB6.4060002@botanika.hu>
Hello Zoltan,
thank you for your reply. When I tried what you suggested, the rda
calculation did not proceed and I received this error message: "Error in
colMeans(x, na.rm = TRUE) : 'x' must be numeric".
This is the same example I used yesterday, but with the changes you
proposed:
mat.sp = matrix(c(40, 20, 37, 49, 52, 34, 35, 87, 90, 45, 49, 52, 34, 35,
87,5,39,99,8,45),nrow = 4, ncol=5, dimnames = list(c("sites1", "sites2",
"sites3","sites4"),c("sp1", "sp2", "sp3", "sp4", "sp5")))
mat.env = matrix(c("NAT","NAT","NR","REST"),4,1, dimnames = list(c("sites1",
"sites2", "sites3","sites4"),c("TYPE")))
as.factor(mat.env[,1])
summary(mat.env)
rda = rda (mat.sp,mat.env)
summary(rda)
plot(rda, scaling=1, type="points")
Do you know what is the problem?
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