Hi all, I have a large data set with ID, PARITY, BREEDING DATE, FARROWING DATE AND WEANING DATE variables. I need to create a new variable that can show the weaning date of the previous PARITY within the same ID. In all PARITY 1 I need a "." in the NEW VARIABLE. This is what I need to achieve: Any help provided will be greatly appreciated!!! Best regards, Francisco
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