Breaks down a dataframe or a factor into its sub-classes

The function takes a categorical vector or dataframe as input and generates subset(s) vectors or dataframes for each category. Subsets are considered invalid if they hold between 1 and 4 observations.

subsetByClassDS(data = NULL, variables = NULL)

Arguments

data

a string character, the name of the dataframe or the factor vector

variables

a vector of string characters, the names of the the variables to subset on.

Value

a list which contains the subsetted datasets

Details

If the input data object is a dataframe it is possible to specify the variables to subset on. If a subset is not 'valid' all its the values are reported as missing (i.e. NA), the name of the subsets is labelled as '_INVALID'. If no variables are specified to subset on, the dataframe will be subset on each of its factor variables. And if none of the columns holds a factor variable a message is issued as output. A message is also issued as output if the input vector is not of type factor.

Author

Gaye, A.