title: How to know if I get a good Weka result
body: <p>I have used Weka to train my data set, but I don't know if I got a good result then.
  Can someone gives me some ideas?
  This is my result:</p>
  
  <pre><code>=== Stratified cross-validation ===
  === Summary ===
  
  Correctly Classified Instances        2823               97.9188 %
  Incorrectly Classified Instances        60                2.0812 %
  Kappa statistic                          0     
  Mean absolute error                      0.0208
  Root mean squared error                  0.1443
  Relative absolute error                 50.6234 %
  Root relative squared error            101.0568 %
  Coverage of cases (0.95 level)          97.9188 %
  Mean rel. region size (0.95 level)      50      %
  Total Number of Instances             2883     
  Ignored Class Unknown Instances                119     
  
  === Detailed Accuracy By Class ===
  
                   TP Rate  FP Rate  Precision  Recall   F-Measure  MCC      ROC Area  PRC Area  Class
                   0.000    0.000    0.000      0.000    0.000      0.000    0.500     0.020     0
                   1.000    1.000    0.979      1.000    0.989      0.000    0.500     0.940     1
  Weighted Avg.    0.979    0.979    0.959      0.979    0.969      0.000    0.500     0.921     
  
  === Confusion Matrix ===
  
      a    b   &lt;-- classified as
      0   60 |    a = 0
      0 2823 |    b = 1
  </code></pre>