ae_median_quantile: Absolute error of the median (quantile-based version)

In epiforecasts/scoringutils: Utilities for Scoring and Assessing Predictions

Absolute error of the median (quantile-based version)

Description

Compute the absolute error of the median calculated as

\textrm{abs}(\textrm{observed} - \textrm{median prediction})

The median prediction is the predicted value for which quantile_level == 0.5, the function therefore requires 0.5 to be among the quantile levels in quantile_level.

Usage

ae_median_quantile(observed, predicted, quantile_level)

Arguments

observed	Numeric vector of size n with the observed values.
predicted	Numeric nxN matrix of predictive quantiles, n (number of rows) being the number of forecasts (corresponding to the number of observed values) and N (number of columns) the number of quantiles per forecast. If observed is just a single number, then predicted can just be a vector of size N.
quantile_level	Vector of of size N with the quantile levels for which predictions were made.

Value

Numeric vector of length N with the absolute error of the median.

See Also

ae_median_sample()

Examples

observed <- rnorm(30, mean = 1:30)
predicted_values <- replicate(3, rnorm(30, mean = 1:30))
ae_median_quantile(
  observed, predicted_values, quantile_level = c(0.2, 0.5, 0.8)
)

epiforecasts/scoringutils documentation built on April 23, 2024, 4:56 p.m.