Hello, I am a new R -user and request your help for the following problem. I need to merge two dataset of longitudinal study which has two column (id and respose) common. when I used merge option to join the datas side be side, because of the repeated subject id, I got larger data set which is not accurate.
I would like to connect twi data sets by id and response in such a way that data are connected by same id and response type and if the same subject has less data point in one data set, then produce NA. Sample data sets is attached. Bibek
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