calculate_base_variables_importance: Calculate base variables importance for each model
In mjalocha/baseImportance: Calculate impoortance of basic variables

Calculate base variables importance for each model

calculate_base_variables_importance(
  importance_frame,
  weights = NULL,
  base_columns = c("model_variable", "base_variable", "model_id")
)

`importance_frame`	- dataframe with columns: model variable name, base variable name, model id, class, and the rest of the columns concern the impact of the variables
`weights`	- weights for importance of variables in each model (default: NULL, equal)
`base_columns`	- names for first four columns (default: c("model_variable", "base_variable", "model_id"))
`divide_by_number`	- boolean, do you want to divide impact by number of base variables