Hello Community, I have been trying for ages to set up a small code to do the following: ID MyValue Rate_1 Rate_2 Result_1 Want_1 Want_2 A 203,000 0.84 0.989 0.83076 0.8308 168,644 A 203,000 1 0.989 0.989 0.8216 166,789 A 203,000 1 0.989 0.989 0.8126 164,955 A 203,000 1 0.989 0.989 0.8036 163,140 B 203,000 0.82 0.9 0.738 0.5931 120,397 B 203,000 1 0.9 0.9 0.5338 108,358 B 203,000 1 0.9 0.9 0.4804 97,522 B 203,000 1 0.9 0.9 0.4324 87,770 C 203,000 0.77 0.989 0.76153 0.3293 66,839 C 203,000 1 0.989 0.989 0.3256 66,104 C 203,000 1 0.989 0.989 0.3221 65,377 C 203,000 1 0.989 0.989 0.3185 64,658 My big file has values like in Column ID, MyValue, Rate_1, Rate_2. I need to obtain the colums Want_1 & Want_2; which is: Result_1 = Rate_1 * Rate_2 (easy to do), (Want_1,Row_1) = (Result_1,Row_1) (Want_1,Row_2) =(Want_1,Row_1) * (Result_1,Row_2) (Want_1,Row_3) =(Want_1,Row_2) * (Result_1,Row_3) and so on... Indeed is the Calculation of Want_1, which is a consecutive multiplaction of current row of Result_1 with previous row value outcome of Want_1. Want_2 is simple the multiplication of Want_1 with MyValue, row by row. I know it can be done totally different a code, but this is way i can interpreate to exaplina my problem. I iwll be so greatfull if someone help me to set up a code in SAS, which I need to apply to a large set of data. Thank you very much Bernardita
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