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st: Program bundle for sequence analysis
on behalf of my co-authors Christian Brzinsky-Fay and Magdalena Luniak I like
to inform you, that a bundle of Stata programs (SQ-Ados) for performing
sequence analysis has been uploaded to the SSC-Archive. The programs can be
installed from within Stata with
. ssc install sq
Sequences are entities build by a limited number of elements that are ordered
in a specific way. A typical example is the human DNA, where the "Elements"
Adenin, Cytosin, Guanin and Thymin (the "organic Bases") are ordered into a
sequence. Other sequences are songs, that are build by tones that appear in a
specific order, or careers of employers that are build by specific
job-positions and ordered along time.
The SQ-Ados are a bundle of commands to describe, analyze and group the
sequences of a sequence dataset. As it stands the following sq commands are
sqset Declare data to be sequence data
sqdes Describe sequences
sqtab Tabulate sequences
sqegen Generate variables reflecting entire sequences
sqstat Describe, summarize, and tabulate sq-egenerated variables
sqindexplot Graph sequences as sequence index plot
sqparcoord Graph sequences with parallel coordinates.
sqom Optimal matching of sequences
sqclusterdat Prepare a dataset to perform Cluster analyses on the
results of sqom
sqclustermat Perform one Cluster analysis on the results of sqom
All programs are fully documented with help files. In addition -help sq-
provides a general introduction and -help sqdemo- a software demonstration.
An article for the Stata Journal is "in the making".
Installation of the SQ-Ados conflicts with the older SQ-package by Nick Cox.
Users of this package need to install the SQ-Ados with
. ssc install sq, replace
and reinstall Nicks package with
. ssc install sqr
Here is Kit Baum's explanation for breaking the rule that the first claimant
of a name has rights to the name:
> ... There was a little problem, which was not immediately
> apparent as you do not actually have a sq.ado. The module name SQ was
> already in use within SSC by Nick Cox for a graph7 utility. As I did
> not detect this problem until partway through the installation, I did
> not follow the usual rule that the first claimant of a name has
> rights to the name. As your package is very large and complicated,
> and has been designed for Stata 9 with Mata components, I decided to
> exercise the discretion to rename Nick's sq routine to sqr (it makes
> old-style graphs square). That seemed more straightforward than
> insisting that you rename your entire suite of routines something
> like 'seq';
My apologies to Nick for taking over his name, and many thanks to Kit Baum for
not forceing me to change the SQ-Ado bundle.
+49 (030) 25491-361
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