Dear Listers,
I would be interested in representing a trend surface including an
interaction term z = f(x,y,x.y) - eg the type of chart obtained with
persp() or wireframe(), then adding datapoints as a cloud, ideally with
dots which are under the surface in a color, and those who are above in
Sorry to answer to myself. A solution was trivial with lattice... (as
often !)
library(lattice)
modbusetmp-lm(IKA_buse ~ Ct *Cc,data=dtbuse)
G1-cloud(IKA_buse~Ct*Cc,type=h,data=dtbuse)
G2-cloud(IKA_buse~Ct*Cc,data=dtbuse)
seqCc-seq(min(dtbuse$Cc),max(dtbuse$Cc),l=20)
