id,summary,reporter,owner,description,type,status,priority,milestone,component,resolution,keywords,cc,work_issues,upstream,reviewer,author,merged,dependencies,stopgaps
8547,implement hidden markov models in Cython from scratch (so can remove the GHMM standard package from Sage),was,mhampton,"NOTE: After applying this patch(es), the following standard spkg can be completely deleted:
    ghmm-20080813.p0.spkg

This patch provides a complete reimplementation of Hidden Markov Models from scratch in Sage.  It is now doctested and the tests should pass on all standard Sage platforms.   Note that that HMM code in sage-4.3.4 and earlier is *NOT* tested at all, can easily segfault in all kinds of cases, leaks huge amounts of memory, etc.  The new code shouldn't have those defects.  Plus we get to delete a standard spkg.   Moreover, this new code is much easier to modify and experiment with.  Performance is generally similar, sometimes better, and sometimes worse, than the old code. 
",enhancement,closed,major,sage-4.4,statistics,fixed,,jason mhampton,,N/A,"Marshall Hampton, Tom Boothby, Jason Grout",William Stein,sage-4.4.alpha0,,