Hi Sergei, I'm trying to get a branch length between two terminals using


Code (]brLength = BranchLength ( FixTree, "CHB104EN, CHB104" );[/code):

where CHB104EN and CHB104 are terminal nodes in a topology. However, brLength returns -1. Actually, the code I'm using is [code]ExecuteCommands ( "brLength = BranchLength ( FixTree, \"" + PairData[ j ][ 0 ] + "; " + PairData[ j ][ 1 ] + "\" );");

where PairData is defined as

[code]PairData = { { "CHB1EN", "CHB1"}{ "CHB104EN", "CHB104"}{ "CHB106EN", "CHB106"}{ "CHB107EN", "CHB107"}{ "CHB108EN", "CHB108"} }[/code]I've tried both "," and ";" separated taxa, yet both return -1. Any help/suggestions would be much appreciated. thanks ./w

Dear Wayne,

The correct syntax is

[code]
BranchLength(tree,"taxon 1;taxon 2")
[/code]

Make sure there are no extra spaces between ';' and the second taxon and keep in mind that the names are case sensitive.

Cheers,
Sergei

Hi Sergei, thanks, a space was the problem. regards ./w