powerplot {DAAG}

Plot of Power Functions

Description

This function plots powers of a variable on the interval [0,10].

Usage

powerplot(expr="x^2", xlab="x", ylab="y", ...)

Arguments

expr

Functional form to be plotted

xlab

x-axis label

ylab

y-axis label

...

Further arguments, to be passed to plot()

Details

Other expressions such as "sin(x)" and "cos(x)", etc. could also be plotted with this function, but results are not guaranteed.

Value

A plot of the given expression on the interval [0,10].

Author(s)

J.H. Maindonald

Examples

   oldpar <- par(mfrow = c(2, 3), mar = par()$mar - c(
        1, 1, 1.0, 1),  mgp = c(1.5, 0.5, 0),  oma=c(0,1,0,1))
#    on.exit(par(oldpar))
    powerplot(expr="sqrt(x)", xlab="")
    powerplot(expr="x^0.25", xlab="", ylab="")
    powerplot(expr="log(x)", xlab="", ylab="")
    powerplot(expr="x^2")
    powerplot(expr="x^4", ylab="")
    powerplot(expr="exp(x)", ylab="")
par(oldpar)