A toy dataset is generated to demonstrate phyclust.
It has 100 nucleotide sequences and 200 sites in 4 clusters
where the ancestral tree height 0.15 and the descendant tree height 0.09,
and sequences are evolved by a HKY85 model. The structre of class seq.data is a list containing:
ll{
code.type either "NUCLEOTIDE" or "SNP".
info header for phylip file.
nseq number of sequences, $N$.
seqlen length of sequences, $L$.
seqname sequence names.
org.code original codes, dim = $N\times L$.
org transfered ids, dim = $N\times L$.
byrow TRUE for dim = $N\times L$, FALSE for transpose.
}