Creating subsets of data frames¶
Here we use data from the British Election Study 2010. The data set bes2010feelings-prepost.RData is prepared from the original available at https://www.britishelectionstudy.com/data-object/2010-bes-cross-section/ by removing identifying information and scrambling the data.
We then create a subset with only observations from Scotland and with parties and party leaders that run in Scotland:
bes2010flngs_pre_scotland <- subset(bes2010flngs_pre, region=="Scotland", select=c( flng.brown, flng.cameron, flng.clegg, flng.salmond, flng.labour, flng.cons, flng.libdem, flng.snp, flng.green))
We can now compare the avarage feeling about Gordon Brown in the whole sample and in the subsample from Scotland: First the whole UK:
then the Scotland subsample:
It is also possible to create a subset of cases and variables with the bracket operator, but this is pretty tedious:
bes2010flngs_pre_scotland <- bes2010flngs_pre[ bes2010flngs_pre$region=="Scotland",c( "flng.labour", "flng.cons", "flng.libdem", "flng.snp", "flng.green", "flng.brown", "flng.cameron", "flng.clegg", "flng.salmond")]