Bremer support

[Karl Magnacca]

On 28 Nov 2005 at 20:56, James Zahniser wrote:
> I have used Goloboff et al's program TNT.  It runs very quickly and
> is fairly user friendly.  You constrain nodes by interfacing with
> your tree of choice and run an analysis for each constraint.  It is a
> little repetitive to run analyses for each constrained node, but far
> quicker than with traditional searches.

I should point out, however, that most of the boasts about TNT are
overblown.  I ran it against Paup on three different computers and found
that TNT took between two and ten times as long (depending on the
processor speed of the computer).  It's supposed to be best on large
data sets but doesn't always find the shortest trees in that case.

> Those more computer-savvy than me might know how to run a batch file to
> compute support for all nodes with a set of runs.

There is a program called AutoDecay that will generate constraint trees
for all nodes.  It runs off Paup but it's easy to convert a file of Paup
trees to Hennig86/Nona format (which I believe is used by TNT as well)
using search and replace.

Karl
=====================
Karl Magnacca, USGS-BRD
PO Box 11, Hawaii Natl. Park, HI 96718
"Democracy used to be a good thing, but now it has
gotten into the wrong hands."   --Sen. Jesse Helms