added an extra utility on the matrix so tha you can create diagonal matrices with a single element
added an extra utility on the matrix so tha you can create diagonal matrices
with a single element


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