mlbench: mlbench.spirals – R documentation

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mlbench.spirals

Two Spirals Benchmark Problem

Description

The inputs of the spirals problem are points on two entangled spirals. If sd>0, then Gaussian noise is added to each data point. mlbench.1spiral creates a single spiral.

Usage

mlbench.spirals(n, cycles=1, sd=0)
mlbench.1spiral(n, cycles=1, sd=0)

Arguments

`n`	number of patterns to create
`cycles`	the number of cycles each spiral makes
`sd`	standard deviation of data points around the spirals

Value

Returns an object of class "mlbench.spirals" with components

`x`	input values
`classes`	factor vector of length `n` with target classes

Examples

# 1 cycle each, no noise
p<-mlbench.spirals(300)
plot(p)
#
# 1.5 cycles each, with noise
p<-mlbench.spirals(300,1.5,0.05)
plot(p)

mlbench

Machine Learning Benchmark Problems

v2.1-3

GPL-2

Authors

Friedrich Leisch and Evgenia Dimitriadou.

Initial release

2021-01-21