lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-11602) Add Markov Chain Stream Evaluator
Date Fri, 03 Nov 2017 19:36:01 GMT

    [ https://issues.apache.org/jira/browse/SOLR-11602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16238237#comment-16238237
] 

ASF subversion and git services commented on SOLR-11602:
--------------------------------------------------------

Commit 27fca76651129429652017116e29697ecccbf962 in lucene-solr's branch refs/heads/branch_7x
from [~joel.bernstein]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=27fca76 ]

SOLR-11602: Add Markov Chain Stream Evaluator


> Add Markov Chain Stream Evaluator
> ---------------------------------
>
>                 Key: SOLR-11602
>                 URL: https://issues.apache.org/jira/browse/SOLR-11602
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Joel Bernstein
>            Assignee: Joel Bernstein
>             Fix For: 7.2
>
>         Attachments: SOLR-11602.patch, SOLR-11602.patch, SOLR-11602.patch
>
>
> Now that Streaming Expressions supports Monte Carlo simulations it would be useful to
also support Markov Chains. This ticket will add support for Markov Chain simulations.
> Here is the syntax:
> {code}
> let(state0=array(.3, .4, .3),
>     state1=array(.2, .1, .7),
>     state2=array(.6, .2, .2),
>     states=matrix(state0, state1, state2),
>     m=markovChain(states, 0),
>     s=sample(m, 500))
> {code}
> The Markov chain is initialized with a matrix who's rows represent the different *states*
of the system. The columns represent the probabilities of changing from one state to another
state.
> For example if we are in state 1 represented by the array(.2,.1,.7), there is a .7 percent
probability that it will transition to state 2.



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org


Mime
View raw message