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BranchLength Built-in function
  'BranchLength' returns the expected number of substitution along a given branch using the model and parameter value currently attached to the branch. The value of 0 is returned for undefined cases.
Syntax  BranchLength (treeID, branch index);
Notes 'treeID' is an exisiting tree;
'branch index' is the integer index of the branch whose length we wish to retrieve, in the pre-order traversal sequence.
Examples
 Last modified: 5/11/2000

 
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