search for: abundtmrt

Hi all, I am fairly new to R and I am trying to run mvpart and create a MRT using explanatory variables and covariables. I've been following the procedures in Numerical Ecoogy with R. The command (no covariables) which works fine - ABUNDTMRT <- mvpart(abundance ~ .,factors,margin=0.08,cp=0,xv="1se",xval=nrow(abundance),xvmult=100,which=4) where abundance is 4th root transformed fish abundance (103 species x 168 samples), and factors is the relief (high, medium, low profile, sand inundated reef, flat), benthos (coral, sess...