plotrix (version 3.8-2)

jiggle: Calculate equally spaced values within a range.

Description

Calculates a specified number of equally spaced values in a range

Usage

jiggle(n,range=c(-1,1))

Value

A vector of n values within the range specified.

Arguments

n

The number of values to calculate.

range

The range within which to fit the values.

Author

Jim Lemon

Details

jiggle is an alternative to the jitter function. Instead of using runif to provide the values, it calls sample and then scales the resulting values to the range specified. This guarantees that the values will be evenly spaced.

Examples

 ahw.df<-data.frame(Age=rnorm(100,35,10),
  Height=rnorm(100,160,15),Weight=rnorm(100,75,20))
 par(mfrow=c(1,3))
 boxplot(ahw.df$Age,main="Age")
 points(jiggle(100,c(0.5,1.5)),ahw.df$Age,col="red")
 boxplot(ahw.df$Height,main="Height")
 points(jiggle(100,c(0.5,1.5)),ahw.df$Height,col="green")
 boxplot(ahw.df$Weight,main="Weight")
 points(jiggle(100,c(0.5,1.5)),ahw.df$Weight,col="blue")