There should be a function that looks for alternative records of missing data, such as ".", "-", " ", etc. that should be flagged for the user. It should be possible for the user to remove the points if desired. Any removed at should be stored in a separate data.frame containing the input source, the original data that were removed or altered, and the reason for the change (i.e., "alternative recording of NA")
There should be a function that looks for alternative records of missing data, such as ".", "-", " ", etc. that should be flagged for the user. It should be possible for the user to remove the points if desired. Any removed at should be stored in a separate data.frame containing the input source, the original data that were removed or altered, and the reason for the change (i.e., "alternative recording of NA")