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Re: [Wekalist] Problem reading matrix from kernelMatrix.matrix
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From: Ralf <ral...@gm...> - 2015-05-01 13:10:16
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SMO Implements John Platt's sequential minimal optimization algorithm for training a support vector classifier. This implementation globally replaces all missing values and transforms nominal attributes into binary ones. Moreover, it normalizes all attributes by default. However, In WEKA, If you have in addition to the training set file a test set that is located in different file form the training set, where you have to replace the last attribute with "?". To perform prediction process with e.g., SMO, then in Classify panel, under the "Test options" choose "Supplied test set" option to load your test set file. PS: Regarding the "PrecomputedKernelMatrixKernel", the kernel matrix needs to be stored in a separate file which you have to load it form the "kernelMatrixFile" an option of PrecomputedKernelMatrixKernel. On other hand, in order to get probability estimates with SMO, you have to fit the logistic model to the outputs through the option "buildLogisticModels" by setting it to be "True". Kind regards, Ralf On Fri, May 1, 2015 at 8:00 PM, james wafula [via WEKA] < ml-node+s8497n34418h34(a)n7.nabble.com> wrote: > Many thanks Ralf, it is now OK. But I wish to know how then this will be > useful when I have a new dataset - test set i.e. I want to predict the > class for a new observation. If only what I am providing is the index > attribute that refers to the rows/columns of the kernel matrix, how will > this information be sufficient to label a new observation appropriately? > > Best regards, > > James. > > > > On Friday, May 1, 2015 9:40 AM, Ralf <[hidden email] > <http:///user/SendEmail.jtp?type=node&node=34418&i=0>> wrote: > > > I believe THAT the kernel you provided cannot deal with the data that you > loaded. This kernel is based on a static kernel matrix that is read from a > file. Instances must have a single nominal attribute (excluding the class). > This attribute must be the first attribute in the file and its values are > used to reference rows/columns in the kernel matrix. The second attribute > must be the class attribute. > > Wish this helps. > Ralf > > > On Fri, May 1, 2015 at 4:09 AM, james wafula [via WEKA] <[hidden email]> > wrote: > > Hi all, > > I am very new to Weka. I have played around with using pre-computed kernel > matrix and all was well until recently. Now I get the following error: > > Problem reading matrix from kernelMatrix.matrix > > What could be the problem? I have neither altered the kernel matrix nor > the arff file at all. > > Best regards, > > James. > > > > > On Thursday, April 30, 2015 6:57 PM, jason roger <[hidden email]> wrote: > > > Dear Weka user, > > Anybody knows how Weka able to select "wordsToKeep" parameter of > StringToWordVector filer? > > Thanks a lot. > > Jason > > > > _______________________________________________ > Wekalist mailing list > Send posts to: [hidden email] > List info and subscription status: > http://list.waikato.ac.nz/mailman/listinfo/wekalist > List etiquette: > http://www.cs.waikato.ac.nz/~ml/weka/mailinglist_etiquette.html > > > > _______________________________________________ > Wekalist mailing list > Send posts to: [hidden email] > > List info and subscription status: > http://list.waikato.ac.nz/mailman/listinfo/wekalist > List etiquette: > http://www.cs.waikato.ac.nz/~ml/weka/mailinglist_etiquette.html > > > > ------------------------------ > If you reply to this email, your message will be added to the discussion > below: > http://weka.8497.n7.nabble.com/no-subject-tp34407p34408.html > To start a new topic under WEKA, email [hidden email] > To unsubscribe from WEKA, click here. > NAML > <http://weka.8497.n7.nabble.com/template/NamlServlet.jtp?macro=macro_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml> > > > > ------------------------------ > View this message in context: Re: Problem reading matrix from > kernelMatrix.matrix > <http://weka.8497.n7.nabble.com/no-subject-tp34407p34416.html> > Sent from the WEKA mailing list archive <http://weka.8497.n7.nabble.com/> > at Nabble.com. > > > _______________________________________________ > Wekalist mailing list > Send posts to: [hidden email] > <http:///user/SendEmail.jtp?type=node&node=34418&i=1> > List info and subscription status: > http://list.waikato.ac.nz/mailman/listinfo/wekalist > List etiquette: > http://www.cs.waikato.ac.nz/~ml/weka/mailinglist_etiquette.html > > > > _______________________________________________ > Wekalist mailing list > Send posts to: [hidden email] > <http:///user/SendEmail.jtp?type=node&node=34418&i=2> > List info and subscription status: > http://list.waikato.ac.nz/mailman/listinfo/wekalist > List etiquette: > http://www.cs.waikato.ac.nz/~ml/weka/mailinglist_etiquette.html > > > ------------------------------ > If you reply to this email, your message will be added to the discussion > below: > http://weka.8497.n7.nabble.com/no-subject-tp34407p34418.html > To start a new topic under WEKA, email ml-node+s8497n2h38(a)n7.nabble.com > To unsubscribe from WEKA, click here > <http://weka.8497.n7.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=2&code=cmFsZmphY2s2NzNAZ21haWwuY29tfDJ8LTExNzg4Njg3OQ==> > . > NAML > <http://weka.8497.n7.nabble.com/template/NamlServlet.jtp?macro=macro_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml> > -- View this message in context: http://weka.8497.n7.nabble.com/no-subject-tp34407p34419.html Sent from the WEKA mailing list archive at Nabble.com. |
