Displaying 1 result from an estimated 1 matches for "fgraze".
2011 Mar 03
1
Error in model.frame.default
...ome data provided and analysed by Zuur et. al. in
their book "Mixed effect models and Extensions in Ecology with R". When
i run the last command i get a warning message i dont understand.
Loyn<- read.table(file = "loyn.txt",header = TRUE)
Loyn$L.AREA<- log10(Loyn$AREA)
fGRAZE <-factor(Loyn$GRAZE)
M0<- lm(ABUND~ L.AREA + fGRAZE, data = Loyn)
summary(M0)
plot(x = Loyn$L.AREA, y = Loyn$ABUND,
xlab = "Log transformed AREA",
ylab = "Bird Abundance")
D1<- data.frame(L.AREA= Loyn$L.AREA[Loyn$GRAZE==1], fGraze = "1")
P1<- p...