[R] ctree - party package multivariate response variables

[valeriano.parravicini at unige.it]

Hi,

I have a problem with ctree of party package.
I have data on distribution of more than one species (about 50 species) and I
would like identify the relation of this multivariate object (species
distribution) with a number of explanatory variables.

rs is the name of my dataframe containing the species (columns from 2 to 51) and
the explanatory variables (columns 52 and 53). Rows are my sampling sites.

I wrote:

species<-rs[,2:51]
v1<-rs[,52]
v2<-rs[53]
tree<-ctree(species~v1+v2)

It does not work , but when I use the same formula for the univariate case (i.e.
a single column - e.g. the total number of species in each samplig sites) it
works. I know that ctree can handle multivariate response variables, but I
cannot figure out how to do that.

Someone can help me?

Thank you



Valeriano