Select rows in the top n groups according to some summarization operation

Select rows in the top n groups according to some summarization operation

top_n_groups(df, group_var, val_var, val_fun = sum)

Arguments

df	data frame
group_var	grouping variable
val_var	value assessment variable to be summarized by group
val_fun	value assessment function to apply to val_var by group

Value

data frame only with observations from top groups