derive a new difference matrix from an old difference matrix by merging or deleting
items
This program can be used to quickly derive a smaller difference matrix
from a larger one, without having to rerun the lengthy calculations that
were needed to derive the initial difference matrix.
Say, you have used the
Levenshtein program to
derive a difference table for six items, labelled
A to
F. If you join these in two items,
ABC and
DEF, the
distance between those two items will be much less accurate than if you
had run the Levenshtein program on data that was already joined into two
groups,
ABC and
DEF.
You can use
locmod to derive the corresponding
file with coordinates.
