i need to merge two instances(those are output of StrinToWordVector) with different set of attribute but overlapping and completely different instances in weka .is there any easy way to do it ?(in other word,i have two tfidf matrix with diferent doc and different word (but overlapped) and i want to have a tfidf matrix that is union of all of them)
You can use InputMappedClassifier, although there are two other options if you still have your documents in raw format, as discused here.