2 seqfile = examples/mtprim9.nuc * sequence data file name
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3 outfile = mp * main result file
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4 treefile = examples/9s.trees * tree structure file name
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6 seqtype = 0 * 0:nucleotides; 2:amino acids, 3:binary
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7 ncatG = 8 * # of categories in the dG model of rates
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8 nhomo = 0 * nonhomogeneous in calcualting P for branch
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