The function returns a data frame where, the row names correspond to the variable names, and a set of columns with summary information for each variable. Its purpose is to allow the user to quickly scan the data frame for potentially problematic variables.
A data frame.
The returned data frame contains the variables Class (numeric, integer,factor, or character), missing values), Levels (the levels of a factor variable, or NA for non-factor variables), Min.Level.Size (the number of cases for the smallest level of a factor, or NA for a non-factor), Mean (the mean of non-missing cases for a numeric or integer variable, or NA for factor and character variables), and SD (the standard deviation of non-missing cases for a numeric or integer variable, or NA for factor and character variables).
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