I want to import a bunch of xml data in weka. Is there a straightforward solution or a tutorial or I have to maually convert it to a csv or arff file format?
There's no straightforward way to load instances into Weka from XML. Your only real options are CSV, arff or a database, so you'll have to write some conversion code. I've used rarff in the past to build arff files using Ruby.
WEKA does not support XML file as input dataset. WEKA allows to start Classifiers and Experiments with the -xml option followed by a filename to retrieve the command line options from the XML file instead of the command line. see this link: https://www.cs.waikato.ac.nz/~ml/weka/xml/index_old.html
来源：https://stackoverflow.com/questions/2814104/how-to-import-xml-files-in-weka