FourSpeciesSitePatternCounts computes the frequency of each type of informative sites.
With four species, 3 types are expected: 1100, 0110 and 1010. On entry will be output for each of these types.
The remaining sites will be pulled in a column called “Ignored”.
maf.filter= \ [...], SequenceStatistics( \ statistics=(\ \ [...], FourSpeciesSitePatternCounts( \ species1=sp1, \ species2=sp2, \ species3=sp3, \ species4=sp4 \ [...]), \ ref_species=sp1, \ file=data.statistics.csv), \ [...]
First species to consider (resp. second, third and fourth).