Group infrequent levels in
data, either a factor or a data.frame
Group infrequent factor levels in a data.frame
Group infrequent factor levels in a list of data.frames
1 2 3 4 5 6 7 8 9 10
A data.frame or factor. In the first case,
Numeric. The maximum number of levels allowed per factor
A factor with at most
maximum_levels, or a data.frame where each factor matches that requirement
factor: Group infrequent levels in a factor. Takes a factor, and if that factor has more than 'maximum_levels', it makes a table of level frequencies. The top (maximum_levels-1) are left unchanged, all less frequent levels are grouped into the level "other".
data.frame: Takes a data.frame, and applies group_levels.factor to each column
list: Takes a list of data.frames and applies
group_levels.data.frame to each
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