pp_na_impute: Create a pp module which imputes missing data.
In jeongnna/dps: Data Preprocessing Sequence

Create a pp module which imputes missing data.

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pp_na_impute(num_cols, cat_cols, num_method = "mean",
  cat_method = "frequent", desc = NULL, data = NULL,
  standby = TRUE)

`num_cols`	A character vector. Specify the names of numerical features.
`cat_cols`	A character vector. Specify the names of categorical features.
`num_method`	A character. Method for imputing numerical features. Choose one of ("mean", "median", "frequent").
`cat_method`	A character. Method for imputing categorical features. Only "frequent" is available.
`desc`	(optional) Description of the module.