mlr3proba (version 0.3.2)

PredictionSurv: Prediction Object for Survival

Description

This object stores the predictions returned by a learner of class LearnerSurv.

The task_type is set to "surv".

Super class

mlr3::Prediction -> PredictionSurv

Active bindings

truth

(Surv) True (observed) outcome.

crank

(numeric()) Access the stored predicted continuous ranking.

distr

(VectorDistribution) Access the stored predicted survival distribution.

lp

(numeric()) Access the stored predicted linear predictor.

response

(numeric()) Access the stored predicted survival time.

Methods

Public methods

• PredictionSurv$new()

• PredictionSurv$clone()

• mlr3::Prediction$format()

• mlr3::Prediction$help()

• mlr3::Prediction$print()

• mlr3::Prediction$score()

Method new()

Creates a new instance of this R6 class.

Usage

PredictionSurv$new(
  task = NULL,
  row_ids = task$row_ids,
  truth = task$truth(),
  crank = NULL,
  distr = NULL,
  lp = NULL,
  response = NULL,
  check = TRUE
)

Arguments

task

(TaskSurv) Task, used to extract defaults for row_ids and truth.

row_ids

(integer()) Row ids of the predicted observations, i.e. the row ids of the test set.

truth

(survival::Surv()) True (observed) response.

crank

(numeric()) Numeric vector of predicted continuous rankings (or relative risks). One element for each observation in the test set. For a pair of continuous ranks, a higher rank indicates that the observation is more likely to experience the event.

distr

(VectorDistribution) VectorDistribution from distr6. Each individual distribution in the vector represents the random variable 'survival time' for an individual observation.

lp

(numeric()) Numeric vector of linear predictor scores. One element for each observation in the test set. \(lp = X\beta\) where \(X\) is a matrix of covariates and \(\beta\) is a vector of estimated coefficients.

response

(numeric()) Numeric vector of predicted survival times. One element for each observation in the test set.

check

(logical(1)) If TRUE, performs argument checks and predict type conversions.

Method clone()

The objects of this class are cloneable with this method.

Usage

PredictionSurv$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

See Also

Other Prediction: PredictionDens

Examples

# NOT RUN {
if (requireNamespace("rpart", quietly = TRUE)) {
library(mlr3)
task = tsk("rats")
learner = mlr_learners$get("surv.rpart")
p = learner$train(task, row_ids = 1:20)$predict(task, row_ids = 21:30)
head(as.data.table(p))
}
# }