plot_heatmap function

Create a heatmap of a scoring metric

This function can be used to create a heatmap of one metric across different groups, e.g. the interval score obtained by several forecasting models in different locations.

plot_heatmap(scores, y = "model", x, metric)

Arguments

• scores: A data.frame of scores based on quantile forecasts as produced by score().
• y: The variable from the scores you want to show on the y-Axis. The default for this is "model"
• x: The variable from the scores you want to show on the x-Axis. This could be something like "horizon", or "location"
• metric: String, the metric that determines the value and colour shown in the tiles of the heatmap.

Returns

A ggplot object showing a heatmap of the desired metric

Examples

library(magrittr) # pipe operator
scores <- example_quantile %>%
  as_forecast_quantile %>%
  score()
scores <- summarise_scores(scores, by = c("model", "target_type"))
scores <- summarise_scores(
  scores, by = c("model", "target_type"),
  fun = signif, digits = 2
)

plot_heatmap(scores, x = "target_type", metric = "bias")