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2008 Jun 09
2
converting a data set to a format for time series analysis
...g this human subject, the date when the subject was enrolled, and a vector with variables representing characteristics of the site (e.g., number of beds in a hospital). my data sets looks like this: subject hospital date_enrollment hospital_beds 1 hospitalA 1/3/2002 300 2 hospitalA 1/6/2002 300 3 hospitalB 2/4/2002 150 4 hospitalC 3/2/2002 200 to perform a time series analysis I am now trying to get to a format that would give me the following variables: month year site number_enrolled_subjects hospital_beds the data would be displayed on one-month intervals, and number of subjects clustered aroun...