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> library(ade4)
> library(ggplot2)
> library(grid)
> data <- read.table("otu_table.even.txt", head=T, row.names=1, sep="\t"
> groups <- read.table("group.list",head=F, colClasses=c("character","character")
> data <- t(data)
> pca <- dudi.pca(data[,1:ncol(t(data))], scannf=F, nf=5)
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