rm DS_letter_create.txt 
rm DS_letter_test.txt 
rm CL_letter_BoostedC45.txt
rm CL_letter_C45.txt
rm CL_letter_RR.txt
rm CL_letter_SRR.txt
rm confusion_matrix_letter_BoostedC45.txt
rm confusion_matrix_letter_C45.txt
rm confusion_matrix_letter_RR.txt
rm confusion_matrix_letter_SRR.txt
rm *~
