perClass Mira Cross-validation tool allows us to define default action executed when moving to a new fold. By default, nothing happens and user can perform any desired analysis manually. That is what we did in the earlier examples in this section.


The Action combo box in the Cross-validation panel allows us to change this default behaviour. We may retrain classifier or regressor or rerun their model search.



Now, after a new fold is selected, the regression model search is automatically re-run. This simplifies further the common work-flow:


  • Setup cross-validation scheme and definition of samples, if needed
  • Set the default action
  • Start cross-validation session
    • go to a fold
    • model is rebuilt automatically
    • copy results of interest
  • Repeat until all folds are performed