Other doubt: In case I want to calculate difference time (minutes) between two rows by conditioning it for day and group (Group A or Group B, for example), I put: if first.day and first.group then difference=.; Or Is there another way?
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I'm a layman in SAS. I'm using SAS Enterprise Guide and I have a problem. I need to calculate the difference time (minutes) between two rows. However, only calculate the difference when it's on the same day. For example: How to calculate difference time and to create the Difference Column?
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