Draw Function Plots

Usage

curve(expr, from, to, n=101, ...)

Arguments

expr an expression, written as a function of x which will be plotted.
from,to the range over which the function will be plotted.
n the expression will be evaluated at n points equally spaced over the range [from, to]. The points determined in this way are then joined with straight lines.
... graphical parameters can also be specified as arguments.

Description

This function draws a curve corresponding to the given expression (in x) over the interval [from,to]. It is a quick hack which seems to serve a useful purpose, but can give bad results for functions which are discontinuous.

Value

NULL. For ``expensive'' expressions, you should smarter tools.

See Also

splinefun for spline interpolation, lines.

Examples

curve(x^3-3*x, -2, 2)
curve(x^2-2, add = TRUE, col = "violet")


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