mlr_resamplings_spcv_disc function

(sperrorest) Spatial "disc" resampling

Spatial partitioning using circular test areas of one of more observations. Optionally, a buffer around the test area can be used to exclude observations. See the upstream implementation at sperrorest::partition_disc() and Brenning (2012) for further information.

Parameters

• folds (integer(1))

  Number of folds.

• radius (numeric(1))

  Radius of test area disc.

• buffer (integer(1))

  Radius around test area disc which is excluded from training or test set.

• prob (integer(1))

  Optional argument passed down to sample().

• replace (logical(1))

  Optional argument passed down to sample(). Sample with or without replacement.

Examples

library(mlr3)
task = tsk("ecuador")

# Instantiate Resampling
rcv = rsmp("spcv_disc", folds = 3L, radius = 200L, buffer = 200L)
rcv$instantiate(task)

# Individual sets:
rcv$train_set(1)
rcv$test_set(1)
# check that no obs are in both sets
intersect(rcv$train_set(1), rcv$test_set(1)) # good!

# Internal storage:
rcv$instance # table

References

Brenning A (2012). Spatial cross-validation and bootstrap for the assessment of predictionrules in remote sensing: The R package sperrorest.

In 2012 IEEE International Geoscience and Remote Sensing Symposium. tools:::Rd_expr_doi("10.1109/igarss.2012.6352393") .

Super class

mlr3::Resampling -> ResamplingSpCVDisc

Active bindings

• iters: integer(1)

   Returns the number of resampling iterations, depending on the values stored in the `param_set`.
  

Methods

Public methods

• list("ResamplingSpCVDisc$new()")

• list("ResamplingSpCVDisc$instantiate()")

• list("ResamplingSpCVDisc$clone()")

Method new()

Create a "Spatial 'Disc' resampling" resampling instance.

For a list of available arguments, please see sperrorest::partition_disc .

Usage

ResamplingSpCVDisc$new(id = "spcv_disc")

Arguments

• id: character(1)

   Identifier for the resampling strategy.
  

Method instantiate()

Materializes fixed training and test splits for a given task.

Usage

ResamplingSpCVDisc$instantiate(task)

Arguments

• task: mlr3::Task

   A task to instantiate.
  

Method clone()

The objects of this class are cloneable with this method.

Usage

ResamplingSpCVDisc$clone(deep = FALSE)

Arguments

• deep: Whether to make a deep clone.