mlbench.spirals {mlbench} | R Documentation |

## 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)

[Package

*mlbench* version 1.0-0

Index]