Filter to common cases

For a fair comparison of models, the verification should only be done for dates and locations that are common to all models. common_cases takes a harp_list object as input and then identifies and filters to only those cases that are common to all of the forecast models in the harp_list object. By default this is done with the SID, fcst_dttm and lead_time columns, but extra columns can be added via .... If one of the columns is a vertical coordinate ("p", "z", "ml" for pressure, height and model level respectively), that column will also be included.

Usage

common_cases(.fcst, ...)

Arguments

.fcst

A harp_list object

...

Extra columns from which to determine the common cases. To remove one of the default columns from the test use -

.

Value

The input data frame with only the common stations and forecast dates for each forecast model selected.