Displaying 1 result from an estimated 1 matches for "best_visit".
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best_dist
2009 Mar 04
2
Selecting one row or multiple rows per ID
Hi,
Could someone help with coding this in R?
I need to select one row per patient i in clinic j. The data is organized similar to that shown below.
Two columns - patient i in column j identify each unique patient. There are two columns on outcome. Some patients have multiple rows with each row representing one visit, coded for in the column, visit. Some patients have just one row indicating