SADI is a suite of Stata tools for sequence analysis, with a particular focus on holistic comparisons
of sequences using measures such as optimal matching distance. It provides a number of distance
• Optimal matching distance
• Hamming distance
• Dynamic Hamming distance
• Elzinga’s combinatorial X/t measure and
• TWED, a time-warping distance measure.
It provides a number of utilities for graphing sequence-related data, for summarising sequences,
and for handling sequences in general.
The main alternatives to SADI are the Stata SQ package (Brzinsky-Fay, Kohler&Luniak, 2006),
and the R package TraMineR (Gabadinho, Ritschard, Studer & Müller, 2009). SADI provides some
tools that are not in SQ, and is much faster for some important functions. TraMineR is pretty
attractive for those working in R, but SADI makes it possible to do a lot in a Stata environment,
and has distance measures that are not in TraMineR.
Since some of the distance measures are relativel...