Survival Support Vector Machine Learner

Survival support vector machine. Calls survivalsvm::survivalsvm() from survivalsvm.

Details

Four possible SVMs can be implemented, dependent on the type parameter. These correspond to predicting the survival time via regression (regression), predicting a continuous rank (vanbelle1, vanbelle2), or a hybrid of the two (hybrid). Whichever type is chosen determines how the crank predict type is calculated, but in any case all can be considered a valid continuous ranking.

makediff3 is recommended when using type = "hybrid".

Dictionary

This Learner can be instantiated via the dictionary mlr_learners or with the associated sugar function lrn():

mlr_learners$get("surv.svm")
lrn("surv.svm")

Meta Information

• Task type: “surv”

• Predict Types: “crank”, “response”

• Feature Types: “logical”, “integer”, “numeric”, “character”, “factor”

• Required Packages: mlr3, mlr3proba, mlr3extralearners, survivalsvm

Parameters

Id	Type	Default	Levels	Range
type	character	regression	regression, vanbelle1, vanbelle2, hybrid	-
diff.meth	character	-	makediff1, makediff2, makediff3	-
gamma.mu	untyped	-		-
opt.meth	character	quadprog	quadprog, ipop	-
kernel	character	lin_kernel	lin_kernel, add_kernel, rbf_kernel, poly_kernel	-
kernel.pars	untyped	-		-
sgf.sv	integer	5		\([0, \infty)\)
sigf	integer	7		\([0, \infty)\)
maxiter	integer	20		\([0, \infty)\)
margin	numeric	0.05		\([0, \infty)\)
bound	numeric	10		\([0, \infty)\)
eig.tol	numeric	1e-06		\([0, \infty)\)
conv.tol	numeric	1e-07		\([0, \infty)\)
posd.tol	numeric	1e-08		\([0, \infty)\)

References

Van Belle, Vanya, Pelckmans, Kristiaan, Van Huffel, Sabine, Suykens, AK J (2011). “Improved performance on high-dimensional survival data by application of Survival-SVM.” Bioinformatics, 27(1), 87--94.

Van Belle, Vanya, Pelckmans, Kristiaan, Van Huffel, Sabine, Suykens, AK J (2011). “Support vector methods for survival analysis: a comparison between ranking and regression approaches.” Artificial intelligence in medicine, 53(2), 107--118.

Shivaswamy, K P, Chu, Wei, Jansche, Martin (2007). “A support vector approach to censored targets.” In Seventh IEEE international conference on data mining (ICDM 2007), 655--660. IEEE.

See also

• Dictionary of Learners: mlr3::mlr_learners.

• as.data.table(mlr_learners) for a table of available Learners in the running session (depending on the loaded packages).

• Chapter in the mlr3book: https://mlr3book.mlr-org.com/basics.html#learners

• mlr3learners for a selection of recommended learners.

• mlr3cluster for unsupervised clustering learners.

• mlr3pipelines to combine learners with pre- and postprocessing steps.

• mlr3tuning for tuning of hyperparameters, mlr3tuningspaces for established default tuning spaces.

Author

RaphaelS1

Super classes

mlr3::Learner -> mlr3proba::LearnerSurv -> LearnerSurvSVM

Methods

Public methods

• LearnerSurvSVM$new()

• LearnerSurvSVM$clone()

Inherited methods

• mlr3::Learner$base_learner()
• mlr3::Learner$format()
• mlr3::Learner$help()
• mlr3::Learner$predict()
• mlr3::Learner$predict_newdata()
• mlr3::Learner$print()
• mlr3::Learner$reset()
• mlr3::Learner$train()

---

Method new()

Creates a new instance of this R6 class.

Usage

LearnerSurvSVM$new()

---

Method clone()

The objects of this class are cloneable with this method.

Usage

LearnerSurvSVM$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

Examples

learner = mlr3::lrn("surv.svm")
print(learner)
#> <LearnerSurvSVM:surv.svm>: Support Vector Machine
#> * Model: -
#> * Parameters: list()
#> * Packages: mlr3, mlr3proba, mlr3extralearners, survivalsvm
#> * Predict Types:  [crank], response
#> * Feature Types: logical, integer, numeric, character, factor
#> * Properties: -

# available parameters:
learner$param_set$ids()
#>  [1] "type"        "diff.meth"   "gamma.mu"    "opt.meth"    "kernel"     
#>  [6] "kernel.pars" "sgf.sv"      "sigf"        "maxiter"     "margin"     
#> [11] "bound"       "eig.tol"     "conv.tol"    "posd.tol"