Last data update: 2014.03.03
R: Two Spirals Benchmark Problem
mlbench.spirals 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)
Results