https://github.com/cran/pracma
Tip revision: 03698027c2d84118bd0c53c4a9a5b5d23676f388 authored by HwB on 01 October 2012, 00:00:00 UTC
version 1.2.0
version 1.2.0
Tip revision: 0369802
ezcontour.Rd
\name{ezcontour,ezmesh}
\alias{ezcontour}
\alias{ezmesh}
\title{
Contour and Mesh Plotter
}
\description{
Easy-to-use contour and 3-D mesh plotter.
}
\usage{
ezcontour(f, xlim = c(-pi,pi), ylim = c(-pi,pi),
n = 60, filled = FALSE, col = NULL)
ezmesh(f, xlim = c(-pi,pi), ylim = c(-pi,pi),
n = 60, col = "lightgray", ...)
}
\arguments{
\item{f}{2-D function to be plotted, must accept \code{(x,y)} as a vector.}
\item{xlim, ylim}{defines x- and y-ranges as intervals.}
\item{n}{number of grid points in each direction.}
\item{col}{colour of isolines lines, resp. the surface color.}
\item{filled}{logical; shall the contour plot be }
\item{...}{parameters to be passed to the \code{persp} function.}
}
\details{
\code{ezcontour} generates a contour plot of the function \code{f} using
\code{contour} (and \code{image} if \code{filled=TRUE} is chosen).
If \code{filled=TRUE} is chosen, \code{col} should be a color scheme,
the default is \code{heat.colors(12)}.
\code{ezmesh} generates a mesh/surface plot of the function \code{f} using
\code{persp}. The most important additional parameters to be passed in
\code{...} are \code{} and \code{}.
The function \code{f} needs not be vectorized in any form.
}
\value{
Plots the function graph and invisibly returns \code{NULL}.
}
\note{
Mimicks Matlab functions of the same names; Matlab's \code{ezcontourf} can
be generated with \code{filled=TRUE}.
}
\author{
HwB email: <hwborchers@googlemail.com>
}
\seealso{
\code{\link{contour}}, \code{\link{image}}, \code{\link{persp}}
}
\examples{
\dontrun{
f <- function(xy) {
x <- xy[1]; y <- xy[2]
3*(1-x)^2 * exp(-(x^2) - (y+1)^2) -
10*(x/5 - x^3 - y^5) * exp(-x^2 - y^2) -
1/3 * exp(-(x+1)^2 - y^2)
}
ezcontour(f, col = "navy")
ezcontour(f, filled = TRUE)
ezmesh(f)
ezmesh(f, col="lightblue", theta = -15, phi = 30)
}
}
\keyword{ graphs }