Hi All, Any help will be much appreciated. Here is a replica of my dataset: ID Type of Drug 1 T1 1 T1 2 T2 2 T2 2 T2 2 T2 3 T3 3 T3 4 T4 4 T4 4 TX I want to find out if for each ID the entries under variable "type of drug" are the same or not. If they are not the same then how can I identify the IDs for which entry for variable "type of drug" is not same throughout? In the example dataset above, each entry under "type of drug" for ID 4 is different. So I want the code to identify ID 4. Thank you in advance.
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