Save column names deleted during preprocessing process

Save column names deleted during preprocessing process

save_deleted_columns(df, pre_df)

Arguments

df

A data source before preprocessing, that is one of the major R formats: data.table, data.frame, matrix, and so on.

pre_df

A data source after preprocessing, that is one of the major R formats: data.table, data.frame, matrix, and so on.

Value

A vector of strings with column names.