Stacking Filters Weka Explorer

Question

Hi I'm new to Weka and using the explorer to try to do some text classification.

I have a training set which I have tested using the "word to string vector filter" and an "attribute selection" filter. However I want to be able to test the classifier on unseen data and so have tried using the "supplied test set option". After reading around I realise that the word to string vector filter has to be applied at the same time to both sets so I have used the "Filtered Classifier" option and proceeded to do this. However I cannot seem to apply the Attribute Selection filter as well??

If I am going about this the wrong way please let me know? Or if there is an option to apply or stack multiple filters when classifying that'd be great. Cheers

Answer 1

You have to chain filters (StringToWordVector and AttributeSelection) using MultiFilter, they behave as a single filter you can put into a FilteredClassifier. Check a detailed tutorial at Text Mining in WEKA Revisited: Selecting Attributes by Chaining Filters.