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patients
2003 Sep 07
4
data manipulation
Hi,
I am new to R, coming from a few years using Stata. I've been twisting my
brain and checking several R and S references over the last few days to
try to solve this data management problem: I have a data set with a unique
patient identifier that is repeated along multiple rows, a variable with
month of patient encounter, and a continous variable for cost of
individual encounters. The data