This data set describes an estimated clock-like phylogeny of 193 HIV-1 group M sequences sampled in the Democratic Republic of Congo.
data(hivtree.newick)
data(hivtree.table)hivtree.newick is a string with the tree in Newick format.
  The data frame hivtree.table contains the corresponding internode
  distances.
Strimmer, K. and Pybus, O. G. (2001) Exploring the demographic history of DNA sequences using the generalized skyline plot. Molecular Biology and Evolution, 18, 2298--2305.
coalescent.intervals, collapsed.intervals