Options: -M 4.0 

M5 pruned model tree:
(using smoothed linear models)

rfc <= 41.5 : LM1 (352/44.723%)
rfc >  41.5 : LM2 (90/128.639%)

LM num: 1
bug = 
	-0.0059 * dit 
	+ 0.0355 * rfc 
	+ 0.0073 * ca 
	+ 0.1087

LM num: 2
bug = 
	-0.8304 * dit 
	+ 0.0391 * rfc 
	+ 0.001 * ca 
	+ 0.9778

Number of Rules : 2

Time taken to build model: 0.39 seconds
Time taken to test model on training data: 0.01 seconds

=== Error on training data ===

Correlation coefficient                  0.7099
Mean absolute error                      0.7909
Root mean squared error                  1.366 
Relative absolute error                 83.8262 %
Root relative squared error             70.4352 %
Total Number of Instances              442     



=== Cross-validation ===

Correlation coefficient                  0.7064
Mean absolute error                      0.8199
Root mean squared error                  1.3727
Relative absolute error                 87.0233 %
Root relative squared error             70.6932 %
Total Number of Instances              442