Helper function to set the grouping of a forecast.
Arguments
- data
A data.frame (or similar) with predicted and observed values. See the details section of for additional information on the required input format.
- joint_across
Character vector with columns names that define the variables which are forecasted jointly. Conceptually, several univariate forecasts are pooled together to form a single multivariate forecasts. For example, if you have a column
country
and want to define a multivariate forecast for several countries at once, you could setjoint_across = "country"
.