`unroottree` <-
function(nodematrix)
{
nodes<-nodematrix
root<-rootoftree(nodematrix)
newroot<-nodes[root,2]
nodes[nodes[root,3],4]<-nodes[newroot,4]+nodes[nodes[root,3],4]
nodes[nodes[root,3],1]<-newroot
nodes[newroot,4]<-nodes[root,3]
nodes[newroot,1]<--8
unrootnodes<-nodes[1:(dim(nodematrix)[1]-1),]
return(unrootnodes)
}
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