java -Xmx4g -cp .:weka.jar weka.Run .PCR -t /Users/mjh/Documents/Weka/CNIRS/gas_train.arff -T /Users/mjh/Documents/Weka/CNIRS/gas_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 09, 2016 4:01:54 AM com.github.fommil.jni.JniLoader liberalLoad
INFO: successfully loaded /var/folders/nh/2yzwp0g119d794lrrfwkn9ym0000gp/T/jniloader5896122022400230804netlib-native_system-osx-x86_64.jnilib
First non-zero component at 174. 1 or more at 400
Jun 09, 2016 4:01:55 AM com.github.fommil.jni.JniLoader load
INFO: already loaded netlib-native_system-osx-x86_64.jnilib
1	0.33931645773540264	1.430770974387799
227	0.7286172186712401	1.110543074866927
114	0.8461814086578698	0.8204874575036373
58	0.8988253320284035	0.6695327189697667
30	0.9814892451468894	0.2962453858721225
16	0.9914409754648085	0.19805723871899286
9	0.9906493791898991	0.2066751193233472
Best number of components found was 9

weka.classifiers.functions.PCR@29774679

Time taken to build model: 2.6 seconds
Time taken to test model on training data: 0.04 seconds

=== Error on training data ===

Correlation coefficient                  0.9931
Mean absolute error                      0.1463
Root mean squared error                  0.1776
Relative absolute error                 11.0632 %
Root relative squared error             11.7266 %
Total Number of Instances               50     


=== Error on test data ===

Correlation coefficient                  0.9909
Mean absolute error                      0.1971
Root mean squared error                  0.229 
Relative absolute error                 16.0248 %
Root relative squared error             14.9004 %
Total Number of Instances               10