Regression measure defined as $$ \frac{1}{n} \sum_{i=1}^n \left| \frac{ t_i - r_i}{t_i} \right|. $$

Note

The score function calls mlr3measures::mape() from package mlr3measures.

If the measure is undefined for the input, NaN is returned. This can be customized by setting the field na_value.

Dictionary

This Measure can be instantiated via the dictionary mlr_measures or with the associated sugar function msr():

mlr_measures$get("mape")
msr("mape")

Meta Information

  • Type: "regr"

  • Range: \([0, \infty)\)

  • Minimize: TRUE

  • Required prediction: response

See also