Help! I have a datatset with 200ish rows. There are 170ish unique IDs, meaning multiple people have multiple rows. Is there a way to merge the data from the applicable rows (e.g., some rows are dates so that would not be applicable) with a sum? Such that each unique subject ID only has ONE row in the dataset. If its only possible to this with a dataset with applicable rows (i.e., all numeric/continuous variables), I could subset my data to just subject ID + the needed rows for summing. Does this make sense?