Extract the last test done by a patient only

Extracts the last test only per patient

SurveilLastTest(dataframe, HospNum_Id, Endo_ResultPerformed)

Arguments

dataframe	dataframe
HospNum_Id	Patient ID
Endo_ResultPerformed	Date of the Endoscopy

Examples

cc<-SurveilLastTest(Myendo,'HospitalNumber','Dateofprocedure')