I have a dataset like this: ID value week of visit 1 4.2 0 (baseline) 1 2.5 6 1 4.1 10 1 3.0 12 . . .
And so on for more than 11000 records (more than 1000 subjects). I need to add rows in order to have 52 records per patients (corresponding to the 52 weeks of the year); that is that weeks 1-2-3-4-5 will have the same content of baseline one, except for the column "week of visit". The fact is that each of the rows can have a very different timing, so the only thing I can do is creating a vector giving the number of replications needed for each row, but how can I practically replicate them increasing the index ok the week? thanks niccolò [[alternative HTML version deleted]]
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