Dear colleagues, I have a dataset that looks as below. I would like to make a new dataset that excludes the cases which are joint conjunctions of particular state names and years, so Connecticut and 2010, Maryland and 2010 and Vermont and 2010.
I'm trying the following subset code: newdata<- subset(bpa, (!State=="Connecticut" & year<"2010")) It appears that it's only evaluating both criteria independently and not jointly, so this is returning all cases in 2008 and 2009, leaving out connecticut for those years as well. How do I get subset to return a dataset based on the joint occurrence of values of two variables? Yours, Simon Kiss str(bpa) 'data.frame': 150 obs. of 5 variables: $ State : Factor w/ 50 levels "Alabama","Alaska",..: 1 2 3 4 5 6 7 8 9 10 ... $ year : num 2008 2008 2008 2008 2008 ... $ ban : num 0 0 0 0 0 0 0 0 0 0 ... $ partisan: Factor w/ 3 levels "democrat","mixed",..: 1 1 1 1 1 1 1 2 3 2 ... $ news : num 1.67 2 0 0 2.38 ... ********************************* Simon J. Kiss, PhD Assistant Professor, Wilfrid Laurier University 73 George Street Brantford, Ontario, Canada N3T 2C9 Cell: +1 519 761 7606 ______________________________________________ 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.
