search for: br_f

Hi All, Just hoping some one can give me a hand with a problem... I have a dataframe (DF) with about 5 million entries that looks something like the following: >DF ID Cl Co Brd Ind A AB AB 1 S-3 IND A BR_F BR_F01 1 0 0 2 S-3 IND A BR_F BR_F01 1 0 0 3 S-3 IND A BR_F BR_F01 1 0 0 4 S-3 IND A BR_F BR_F01 1 0 0 5 S-3 IND A BR_F BR_F01 1 0 0 6 S-3 IND A BR_F BR_F01 0 1 0 7 S-3 IND A BR_F BR_F02 0 0 1 8 S-3 IND A BR_F BR_F02 0 1 0 9 S-3 IND A BR_F BR_F02 1 0 0 10...