./lda -pprocess test1 1 // generate training files
./lda -pprocess test2 2 // generate predict files
./lda -est -alpha 0.479358 -beta 0.08 -ntopics 16 -niters 3000 -savestep 100 -twords 20 -dfile model/trndata.txt
./lda -inf -dir model -model model-final -niters 30 -twords 20 -dfile model/predata.txt
./lda -ranking 78 -disp 10 -dir model -model model-final
./lda -class -dir model -model model-final