java -Xmx4g -cp .:weka.jar weka.Run .PCR -t /Users/mjh/Documents/Weka/CNIRS/yarn_train.arff -T /Users/mjh/Documents/Weka/CNIRS/yarn_test.arff
[Weka] RPlugin can't be loaded because the environment variable R_HOME is not set.
[Weka] RPlugin can't be loaded because the environment variable R_HOME is not set
Comp #	Correlation     	RMSE
######	###########     	####
Jun 08, 2016 7:56:22 PM com.github.fommil.jni.JniLoader liberalLoad
INFO: successfully loaded /var/folders/nh/2yzwp0g119d794lrrfwkn9ym0000gp/T/jniloader3627507637277301723netlib-native_system-osx-x86_64.jnilib
Jun 08, 2016 7:56:23 PM com.github.fommil.jni.JniLoader load
INFO: already loaded netlib-native_system-osx-x86_64.jnilib
2	0.9891394811917743	4.38364942962335
149	0.8950738657174424	14.678324670196039
76	0.9547461904154465	9.431912043923093
39	0.9582192682321777	9.039824211216676
21	0.9881385460422305	4.814390647916797
12	0.9999932363423911	0.10985875933021394
Best number of components found was 12

weka.classifiers.functions.PCR@29774679

Time taken to build model: 1.6 seconds
Time taken to test model on training data: 0.01 seconds

=== Error on training data ===

Correlation coefficient                  1     
Mean absolute error                      0.062 
Root mean squared error                  0.0799
Relative absolute error                  0.2437 %
Root relative squared error              0.2678 %
Total Number of Instances               21     


=== Error on test data ===

Correlation coefficient                  0.9999
Mean absolute error                      0.0937
Root mean squared error                  0.1215
Relative absolute error                  0.9832 %
Root relative squared error              1.0411 %
Total Number of Instances                7