ubTomek: Tomek Link

In unbalanced: Racing for Unbalanced Methods Selection

Description

The function finds the points in the dataset that are tomek link using 1-NN and then removes only majority class instances that are tomek links.

Usage

ubTomek(X, Y, verbose = TRUE)

Arguments

X	the input variables of the unbalanced dataset.
Y	the response variable of the unbalanced dataset. It must be a binary factor where the majority class is coded as 0 and the minority as 1.
verbose	print extra information (TRUE/FALSE)

Details

In order to compute nearest neighbors, only numeric features are allowed.

Value

The function returns a list:

X	input variables
Y	response variable
id.rm	index of instances removed

References

I. Tomek. Two modifications of cnn. IEEE Trans. Syst. Man Cybern., 6:769-772, 1976.

See Also

ubBalance

Examples

library(unbalanced)
data(ubIonosphere)
n<-ncol(ubIonosphere)
output<-ubIonosphere$Class
input<-ubIonosphere[ ,-n]

data<-ubTomek(X=input, Y= output)
newData<-cbind(data$X, data$Y)

Example output

Loading required package: mlr
Loading required package: ParamHelpers
Loading required package: foreach
Loading required package: doParallel
Loading required package: iterators
Loading required package: parallel
Instances removed 32 : 14.22 % of 0 class ; 9.12 % of training ; Time needed 0 

unbalanced documentation built on May 2, 2019, 7:01 a.m.