Description Usage Arguments Value
add the variable of previous value of the variable state to the data frame. The data frame should include studyID_c ( id variable), round (screening round), result (current state or screening result).
1 |
df |
A data frame that includes studyID_c ( id variable), round (screening round), result (current state or screening result). |
A data frame which also includes a variable for previous state or result.
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