Full
model name: Felsenstein 81
Model type:
Nucleotide
Model
options:
- Fixed rates.
. Rates are
homogeneous (same for all sites in the data).
- Rate Variation.
Different sites may have different rates. The
user specifies how many different rate classes there should and
selects one of the available distributions
to be sampled. Distribution parameters are estimated.
- Rate Variation+HM. Similar to Rate Variation except that rates
at adjacent sites are correlated via a Hidden Markov Model
Independent
Parameters: a (for each branch of the tree) and,
if rate variation is selected as an option, the
corresponding distribution/hmm parameters.
Rate Matrix:

with the vector representing
nucleotide frequencies (proportions) from the data. '*' is defined
to be the negative of the sum of all other row elements.
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