I currently have a data set describing human subjects enrolled into an international clinical trial, the name of the hospital enrolling 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 around sites. any help would be greatly appreciate thanks Ricardo ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
