Dear all, I would like to ask you the following: I have data about different manuscripts, together with data about the presence/absence of copying errors, in the days when manuscript were really manuscripts. I would ideally like to use the data to draw a phylogenetic tree, so that I can infer which ms was copied from which. The error presence/absence is coded in binary format. The plan is to use a maximun parsimony tree approach. The data looks like this toy example: "ms1" "ms2" "ms3" "ms4" "err1" 0 1 0 0 "err2" 0 0 1 1 "err3" 1 1 0 0 "err4" 0 0 0 1 "err5" 1 1 1 0 "err6" 1 1 0 1 "err7" 0 1 0 0 "err8" 0 1 0 1 Additionally I have a vector of weights for the errors (and more info to be possibly used). Does R have a set of fuctions of a library that will calculate the a phylogenetic tree from such data? I installed "ape", but, despite reading the docs, I cannot find a function that would calculate a tree from data like mine (my sight may be getting worse though). Any suggestion is welcome. Regards, Federico Calboli -- Federico C. F. Calboli Dipartimento di Biologia Evoluzionistica Sperimentale Universit?? di Bologna Via Selmi, 3 40126 Bologna - ITALY Tel - +39 051 2094187 Fax - +39 051 2094286 f.calboli at ucl.ac.uk fcalboli at alma.unibo.it