From: Will Ware <wware@alum.mit.edu>

Date: Wed, 27 Jan 2010 20:01:03 -0500

Message-ID: <d2f491ca1001271701n292adf55mbd22a1cb4ff7af42@mail.gmail.com>

To: public-cwm-talk@w3.org

Date: Wed, 27 Jan 2010 20:01:03 -0500

Message-ID: <d2f491ca1001271701n292adf55mbd22a1cb4ff7af42@mail.gmail.com>

To: public-cwm-talk@w3.org

I am trying to do some bayesian inference with CWM. I've got two random boolean variables which are causally linked by a couple of probabilities, which I am representing thus: @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix bayes: <http://192.168.1.2/bayes#> . @prefix : <#> . :L rdf:type bayes:link1 . :L bayes:p11 0.456 . :L bayes:p01 0.123 . :L bayes:cause :A . :L bayes:effect :B . :A rdf:name "A" . :A rdf:type bayes:boolean . :A bayes:probability 0.7 . :B rdf:name "B" . :B rdf:type bayes:boolean . :B bayes:probability 0.3 . When I observe the value of B, I'll want to update the probability of A. So I was tinkering with the mechanics of updating the probability and did this experiment. @prefix log: <http://www.w3.org/2000/10/swap/log#> . @forAll :who, :what. { :who bayes:probability :what } log:implies { :who bayes:probability 0.12345 }. Running this gives each variable two probabilities: bay:A a :boolean; :probability 0.12345, 0.7; rdf:name "A" . bay:B a :boolean; :probability 0.12345, 0.3; rdf:name "B" . I realized that what's happening here is that I am adding new triples to the model but I don't know a way to delete old triples. Does such a way exist?Received on Thursday, 28 January 2010 21:35:53 UTC

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