Similar to subset_surveys, but will not only remove the 
variables that cannot be harmonized, but renames the remaining variables.
Usage
harmonize_survey_variables(
  crosswalk_table,
  subset_name = "subset",
  survey_list = NULL,
  survey_paths = NULL,
  import_path = NULL,
  export_path = NULL
)Arguments
- crosswalk_table
 A crosswalk table created by
crosswalk_table_createor a manually created crosstable including at leastfilename,var_name_orig,var_name_targetand optionallyvar_label_origandvar_label_target. This parameter is optional and defaults toNULL.- subset_name
 An identifier for the survey subset.
- survey_list
 A list of surveys imported with
read_surveys. If set toNULL, thesurvey_pathshould give full path to the surveys.- survey_paths
 A vector of full file paths to the surveys to subset.
