#nexus
[This file provided by Paul Lewis, from the NCL test suite. ]

begin taxa;
  dimensions ntax=8;
  taxlabels taxon_1 taxon_2 taxon_3 taxon_4 taxon_5 taxon_6 taxon_7 taxon_8;
end;

[!
***********************************************
* Interleaved, upper-triangular, no diagonals *
***********************************************
]
begin distances;
  format nodiagonal triangle=upper interleave;
  matrix
    taxon_1      1  2
    taxon_2         8
    taxon_3

    taxon_1   3   4
    taxon_2   9  10
    taxon_3  14  15
    taxon_4      19
    taxon_5

    taxon_1   5   6   7
    taxon_2  11  12  13
    taxon_3  16  17  18
    taxon_4  20  21  22
    taxon_5  23  24  25
    taxon_6      26  27
    taxon_7          28
    taxon_8;
end;
