Hello, I am working on a dataframe that contains a number of duplicates (e.g a person may have more than one court appearance). There are 539 rows. If I run the code:
> length(unique(Feb25$ Patient.Id)) this indicates there are 508 unique individuals. I have been unable to work out how to filter out rows where there is a duplicate id so that the resulting dataframe consists only of the one id per person, and this id, is the first one thartappears. I was also interested in creating a data frame that consisted of these removed duplicates. Any assistance with the code to do this is much appreciated, regards Bob Green ______________________________________________ [email protected] 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.
