#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;

[!
***************************************************
* Non-interleaved, upper-triangular, no diagonals *
***************************************************
]
begin distances;
  format triangle=upper nodiagonal;
  matrix
    taxon_1    1   2   3   4   5   6   7
    taxon_2        8   9  10  11  12  13
    taxon_3           14  15  16  17  18
    taxon_4               19  20  21  22
    taxon_5                   23  24  25
    taxon_6                       26  27
    taxon_7                           28
    taxon_8;
end;