Re: [R-sig-phylo] Bootstrap values and NJ when there is no genetic distance between samples

2011-05-09 Thread Joe Felsenstein
Emmanuel wrote: Is it a problem with ties or with identical sequences? I guess you can solve the latter easily (eg, using the haplotype function in pegas), and this will solve the vast majority of ties. Other cases of ties will certainly not result in such high bootstrap values (that's my

Re: [R-sig-phylo] Bootstrap values and NJ when there is no genetic distance between samples

2011-05-09 Thread Emmanuel Paradis
Hi Alastair, Alastair Potts wrote on 08/05/2011 00:07: Hi Emmanuel (Klaus and Joe), The example data was meant to demonstrate that the tie-breaking in nj is affecting the bootstrap results - or rather the lack of any way to deal with tie breaking. I've noticed that a bunch of identical sequen