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abund
2011 Feb 06
2
Subsampling out of site*abundance matrix
Hello,
How can I randomly sample individuals within a sites from a site (row) X
species abundance (column) data frame or matrix? As an example, the matrix
"abund2" made below.
##### (sorry, Im a newbie and this is the only way I know to get an example
on here)
abund1 <- c(150, 300, 0, 360, 150, 300, 0, 240, 150, 0, 60,
0, 150, 0, 540, 0, 0, 300, 0, 240, 300, 300, 0, 360, 300, 0, 600, 0)
abund2 <- matrix(data=abund1, nrow=4, ncol...