________________________________
De: Trochine, Carolina Enviado el: mar 23/10/2007 13:45 Para: [EMAIL PROTECTED] Asunto: Multivariate regression tree: problems with surrogate splits R helpers, I am working with the R program performing multivariate regression trees (MRT). I have a matrix with species and environmental variables saved as a CSV file (sprot_matrix.csv), I have 42 species and 8 environmental variables (SECCHI+PH+TA+PTOT+NTOT+CHLA+AREA+ MEANDEP) for 104 samples Title SpA SpB SpC SpD Varible1 Variable2 Variable3 Sample1 Sample 2 Sample 3 Sample 4 Sample 5 after performing the analysis (MRT) I asked for the summary but I didn't get the surrogate splits, only the information for the primary splits (the secuence of commands I used is pasted at the end of the email). I would like to know how to get the information about the surrogate splits, please let me know any ideas. Thank you very much in advanced, Looking forward to hearing from you, Dr. Carolina Trochine Centro Regional Universitario Bariloche Unidad Postal Universidad. R8400FRF. Bariloche, Argentina e-mail:[EMAIL PROTECTED] http://investigadores.uncoma.edu.ar/Lab_Limnologia/default.htm Here is the sequence of commands I used sprot_matrix=read.csv("sprot_matrix.csv", row.names=1) sprot_matrix require(mvpart) mrtsprot_matrix <- mvpart(data.matrix(sprot_matrix [,1:47]) ~SECCHI+PH+TA+PTOT+NTOT+CHLA+AREA+ MEANDEP, sprot_matrix,xv="pick",xvmult=500,use.n=TRUE,all=TRUE,text.add=TRUE) [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
