Clean up PCA test.
Clean up PCA test.


stereomatchingkiss/mlpack,ajjl/mlpack,chenmoshushi/mlpack,thirdwing/mlpack,minhpqn/mlpack,trungda/mlpack,minhpqn/mlpack,theranger/mlpack,thirdwing/mlpack,darcyliu/mlpack,datachand/mlpack,stereomatchingkiss/mlpack,BookChan/mlpack,minhpqn/mlpack,erubboli/mlpack,palashahuja/mlpack,ersanliqiao/mlpack,bmswgnp/mlpack,bmswgnp/mlpack,trungda/mlpack,datachand/mlpack,Azizou/mlpack,erubboli/mlpack,ranjan1990/mlpack,theranger/mlpack,lezorich/mlpack,chenmoshushi/mlpack,ranjan1990/mlpack,ersanliqiao/mlpack,ersanliqiao/mlpack,palashahuja/mlpack,darcyliu/mlpack,Azizou/mlpack,erubboli/mlpack,theranger/mlpack,lezorich/mlpack,ranjan1990/mlpack,ajjl/mlpack,palashahuja/mlpack,bmswgnp/mlpack,trungda/mlpack,datachand/mlpack,lezorich/mlpack,Azizou/mlpack,darcyliu/mlpack,thirdwing/mlpack,ajjl/mlpack,BookChan/mlpack,stereomatchingkiss/mlpack,BookChan/mlpack,chenmoshushi/mlpack