Displaying 1 result from an estimated 1 matches for "area_grass".
2011 Dec 16
1
Model design
...ea A + B are in state "S1"
I have lots of these (13000) cells which are classfied into ~2000
AREA's and ~750 STATE'S
So my question is do AREA'S differ in the amount of grass they contain
i.e does AREA A contain significantly more grass than AREA B?
I have modelled this by
area_grass <- gls(grass~AREA, correlation=corExp(form=~x+y), data = grassland
I have set the contrasts to options(contrasts = c("contr.treatment",
"contr.poly")) as there are no control groups.
What i will get ( it is taking ages!)
is
AREA A: -0.12.... **
AREA B: 0.17....*...