Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st: Observations in Sequence analysis
From
Brendan Halpin <[email protected]>
To
[email protected]
Subject
Re: st: Observations in Sequence analysis
Date
Wed, 03 Oct 2012 23:25:38 +0100
On Wed, Oct 03 2012, Sarah Park wrote:
> However, when I run the cluster analysis based
> on the dissimilarity matrix afterwards, I have Stata categorizing some
> of the sequence with same elements (ex. 333, 333333, 333333333) into
> the same cluster, some into different clusters when they are clearly
> the same sequence.
These are not the same sequence: they have different length. If you are
using the optimal matching algorithm to compare sequences, the indel
cost is incurred for each unit difference in length. If you want these
sequences to be considered the same, you need another approach. If you
really want to consider these sequences as the same, you could remove
consecutive duplicates (so that they would all be the same as the
sequence "3").
Brendan
--
Brendan Halpin, Department of Sociology, University of Limerick, Ireland
Tel: w +353-61-213147 f +353-61-202569 h +353-61-338562; Room F1-009 x 3147
mailto:[email protected] ULSociology on Facebook: http://on.fb.me/fjIK9t
http://teaching.sociology.ul.ie/bhalpin/wordpress twitter:@ULSociology
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/