autoplot.PredictionClassif: Plot for PredictionClassif

View source: R/PredictionClassif.R

autoplot.PredictionClassifR Documentation

Plot for PredictionClassif

Description

Generates plots for mlr3::PredictionClassif, depending on argument type:

  • "stacked" (default): Stacked barplot of true and estimated class labels.

  • "roc": ROC curve (1 - specificity on x, sensitivity on y). Requires package precrec.

  • "prc": Precision recall curve. Requires package precrec.

  • "threshold": Systematically varies the threshold of the mlr3::PredictionClassif object and plots the resulting performance as returned by measure. Arguments in ... are passed down to the score function of the mlr3::Measure.

Usage

## S3 method for class 'PredictionClassif'
autoplot(object, type = "stacked", measure = NULL, ...)

Arguments

object

(mlr3::PredictionClassif).

type

(character(1)):
Type of the plot. See description.

measure

(mlr3::Measure)
Performance measure to use.

...

(any): Additional arguments, passed down to the respective geom, plotting function or measure.

Value

ggplot2::ggplot() object.

Theme

The theme_mlr3() and viridis color maps are applied by default to all autoplot() methods. To change this behavior set options(mlr3.theme = FALSE).

References

Saito T, Rehmsmeier M (2017). “Precrec: fast and accurate precision-recall and ROC curve calculations in R.” Bioinformatics, 33(1), 145-147. doi: 10.1093/bioinformatics/btw570.

Examples

if (requireNamespace("mlr3")) {
  library(mlr3)
  library(mlr3viz)

  task = tsk("spam")
  learner = lrn("classif.rpart", predict_type = "prob")
  object = learner$train(task)$predict(task)

  head(fortify(object))
  autoplot(object)
  autoplot(object, type = "roc")
  autoplot(object, type = "prc")
}

mlr-org/mlr3viz documentation built on Nov. 24, 2022, 3:47 p.m.