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发帖数: 531 | 1 Please help to look at this code, what are these two do loops doing ? Dniu
help me !
* IT is a dataset the previous program has created;
%MACRO FREQ;
PROC IML;
S="SUB1":"SUB9";
USE IT (KEEP=FORM LEVEL SUB1-SUB9);
READ ALL VAR S WHERE (FORM="NEWFORM") INTO M ;
USE IT (KEEP=FORM LEVEL SUB1-SUB9);
READ ALL VAR S WHERE (FORM="OLDFORM" ) INTO K ;
FREQ=J(MAX+1,2*NCOL(M),0);
DO I=1 TO NROW(K);
DO J=1 TO NCOL(K);
IF K[I,J] ^=. THEN
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