Hi, experts, I am a new learner of SAS. Now I have a large dataset with just 0 and 1(please see the attachment). For each ID, I want to find the times of stopout. Here, for instance, one stopout is like this, 101, 1001, 10001, and so on. For the first ID, 001010011, there are two stopouts. Thank you so much for your great help in advance! Johnathan
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