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What is the correct k-fold operation in a decision tree module?

If the k-fold operation of decision tree module is carried out manually,
Is k-fold selected after segmentation?Or is k-fold selected and then segmented?

What exactly does k-fold mean?

ScriptingWindows回复： What is the correct k-fold operation in a decision tree module?

• The second result in the figure is the result of running the script in the example

• dt = Open( "$SAMPLE_DATA/Car Poll.jmp" );
  obj = dt << Partition( Y( :country ), X( :sex, :marital status, :age, :type, :size ), Split Best( 2 ) );
  obj << K Fold Crossvalidation( 5 );

• The script should perform the decision tree operation first and then the K-fold operation.