gen2circles {TDAkit}

Generate Two Intersecting Circles

Description

It generates data from two intersecting circles.

Usage

gen2circles(n = 496, sd = 0)

Arguments

n

the total number of observations to be generated.

sd

level of additive white noise.

Value

a list containing

data

an (n\times 2) data matrix for row-stacked observations.

label

a length-n vector for class label.

Examples

## Generate Data with Different Noise Levels
nn = 200
x1 = gen2circles(n=nn, sd=0)
x2 = gen2circles(n=nn, sd=0.1)
x3 = gen2circles(n=nn, sd=0.25)

## Visualize
opar <- par(no.readonly=TRUE)
par(mfrow=c(1,3), pty="s")
plot(x1$data, pch=19, main="sd=0.00", col=x1$label)
plot(x2$data, pch=19, main="sd=0.10", col=x2$label)
plot(x3$data, pch=19, main="sd=0.25", col=x3$label)
par(opar)