title: what is f-measure for each class in weka
body: <p>When we evaluate a classifier in WEKA, for example a 2-class classifier, it gives us 3 f-measures: f-measure for class 1, for class 2 and the weighted f-measure.</p>
  
  <p>I'm so confused! I thought f-measure is a balanced measure that show balanced performance measure for multiple class, so what does f-measure for class 1 and 2 mean?</p>