Title:	Synthetic Data Generation for Imbalanced Learning in 'R'
Version:	0.0.1
Description:	Machine learning is widely used in information-systems design. Yet, training algorithms on imbalanced datasets may severely affect performance on unseen data. For example, in some cases in healthcare, financial, or internet-security contexts, certain sub-classes are difficult to learn because they are underrepresented in training data. This 'R' package offers a flexible and efficient solution based on a new synthetic average neighborhood sampling algorithm ('SANSA'), which, in contrast to other solutions, introduces a novel “placement” parameter that can be tuned to adapt to each datasets unique manifestation of the imbalance. More information about the algorithm's parameters can be found at Nasir et al. (2022) https://murtaza.cc/SANSA/.
License:	GPL (≥ 3)
Encoding:	UTF-8
RoxygenNote:	7.1.1
Imports:	data.table, FNN, ggplot2
NeedsCompilation:	no
Packaged:	2022-08-22 14:30:11 UTC; murta
Author:	Murtaza Nasir [aut, cre], Ali Dag [ctb], Serhat Simsek [ctb], Anton Ivanov [ctb], Asil Oztekin [ths]
Maintainer:	Murtaza Nasir <mail@murtaza.cc>
Repository:	CRAN
Date/Publication:	2022-08-23 08:40:02 UTC

Title

Description

Title

Usage

sansa(x, y, lambda = 0, ksel = 3)

Arguments

Value

A list with two elements: x contains predictors with synthetic data, y contains target with synthetic data.

Examples

library(sansa)
library(ggplot2)
minority = data.frame(x1 = rnorm(10, 10, 3),
                      x2 = rnorm(10, 25, 10),
                      target = "true")
majority = data.frame(x1 = rnorm(100, 4, 2),
                      x2 = rnorm(100, 30, 10),
                      target = "false")

dataset = rbind(minority, majority)

ggplot(dataset) + geom_point(aes(x1, x2, color = target))
sansaobject = sansa(x = dataset[,1:2], y = dataset$target, lambda = 1, ksel = 3)

balanced <- sansaobject$x
balanced$target = sansaobject$y

ggplot(balanced) + geom_point(aes(x1, x2, color = target))