Nothing
`chao2` <-
function(x,taxa.row=TRUE) {
if (taxa.row==FALSE) x<-t(x)
if (ncol(as.matrix(x))==1) ch<-(int.chao(x))
else if (nrow(as.matrix(x))==1) ch<-(int.chao(x))
else {mat.vectorized <- numeric(length(x[,1]))
for (i in 1:length(x[,1])) mat.vectorized[i] <- length(x[i,][x[i,]>0])
ch<-int.chao(mat.vectorized)
}
return(ch)
}
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