These functions provide convenient wrappers to create the three types of
metric functions in yardstick: numeric metrics, class metrics, and
class probability metrics. They add a metric-specific class to fn and
attach a direction attribute. These features are used by metric_set()
and by tune when model tuning.
See vignette("custom-metrics") for more information about creating custom
metrics.
new_class_metric(fn, direction)new_prob_metric(fn, direction)
new_numeric_metric(fn, direction)
A function. The metric function to attach a metric-specific class
and direction attribute to.
A string. One of:
"maximize"
"minimize"
"zero"