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tsp
2005 Feb 03
1
Efficient selection and alteration of dataframe records
...),rep("Sp2",30),rep("Sp3",20),rep("Sp4",5),rep("Sp5",5)),
dim=runif(100)*100)
plotdf[1,]
abun.table=as.data.frame(table(plotdf$pspp))
#2.1 calculate Smax (count of species)
Smax=length(abun.table$Freq[abun.table$Freq>0])
Smax
traitdf=data.frame(
tspp=c("Sp1","Sp2","Sp3","Sp4","Sp5"),
width=runif(5),
abun=abun.table$Freq)
traitdf[1,]
rm(abun.table)
#3. merge plotdf and traitdf
plotdft=merge(plotdf, traitdf, by.x ="pspp", by.y="tspp")
#4 define summary dataframe s...