title: How to apply classifier in Weka's Explorer?
body: <p>Let's say, I've build a model (e.g. J4.8 tree) and evaluated it with cross-validation. How can I <em>use this model to classify new dataset</em>? I know, I can set a file with the data to classify with "Supplied test set" option, mark "Output predictions" in "More options" window and run classification again. It will produce nearly what I need, but it seems to be a very strange workflow. Also, it re-creates all the model, which can take unnecessary time. Is there more straightforward way to do classification with already built model?   </p>