added test case for radical
added test case for radical

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