Hello,
Try the following.
library(reshape2)
# Don't need 'cbind'
mat <- data.frame(sp1=c(rep(0, 5), rep(1, 5)),
sp2=sample(c(rep(0, 6),rep(1, 4))),
fac=c(rep("a", 3), rep("b", 3), rep("c", 4)))
mat.new <- matrix (c(0, 1, 1, 1, 1, 1), nrow=2, ncol=3)
rownames(mat.new) <- c("sp1
Dear list,
I'm trying to create a matrix by combining the sites that species occur in
a new matrix with species as rows and sites as columns.
The main matrix is "mat":
mat <- as.data.frame(cbind(sp1=c(rep(0, 5), rep(1, 5)),sp2=sample(c(rep(0,
6),rep(1, 4))),
fac=c(rep("a", 3), rep("b", 3),rep("c
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