Python bits of a simple occupancy calculator used for the experiments
reported in the
paper below: README.txt, occupancy.py,
and coords.txt. The
program, based on a simple exhaustive strategy, works well on small (20-50 point) data sets. Better methods
can be devised for different type of data.
M. Bertamini, N. Scott-Samuel, M. Zito, J. Hulleman -
Spatial Clustering and Its Effect on Perceived Clustering, Numerosity and
Attention, Perception, and Psychophysics. 78(5) 1460--1471. 2016.
Synthetic Databases. Here's the JAVA classes for version 1.0 (beta) of a
synthetic database generator (the CoZi
TestGenerator.java, with a
picture of the item occurrence distribution (on a log-log scale) for
a database generated by this program with 20K transactions on 7,902 items
(average size about 10).