From: Michael Kubovy <kubovy_at_virginia.edu>

Date: Thu 04 Jan 2007 - 00:37:17 GMT

Professor Michael Kubovy

University of Virginia

Department of Psychology

WWW: http://www.people.virginia.edu/~mk9y/

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Thu Jan 04 11:44:52 2007

Date: Thu 04 Jan 2007 - 00:37:17 GMT

To Jeff: a tip of the hat.

I have another question after Jeff's solution:

On Jan 3, 2007, at 5:09 PM, Jeffrey Horner wrote:

> Michael Kubovy <kubovy <at> virginia.edu> writes:

*>> I tried and it gave a strange result. See
**>> http://people.virginia.edu/~mk9y/mySite/twoGaussian.R
**>> and
**>> http://people.virginia.edu/~mk9y/mySite/twoGaussian.pdf
**>
**>
**> Try the image function. The smoothness of the plot will be
**> proportional to the length of x and y. For instance 200 isn't bad:
**>
**> mu1 <- 0
**> mu2 <- 5
**> s <- 1
**> x <- seq(-2.5, 7.5, length = 200)
**> y <- seq(-2.5, 2.5, length = 200)
**> f <- function(x,y){
**> term1 <- 1/(2*pi*sqrt(s*s))
**> term2 <- -1/2
**> term3 <- (x - mu1)^2/s
**> term4 <- (y - mu1)^2/s
**> term5 <- (x - mu2)^2/s
**> term1*(.5 * exp(term2*(term3 + term4)) + .5 * exp(term2*(term5
**> + term4)))
**> } # setting up the function of the multivariate normal density
**> z <- outer(x, y, f)
**> # persp(x, y, z)
**> require(grDevices)
**> #pdf('twoGaussian.pdf')
**> #filled.contour(x, y, z, axes = F, frame.plot = F, asp = 1,
**> # col = gray(seq(0, 0.9, len = 25)), nlevels = 25)
**> image(x,y,z,col=gray(seq(0,0.9,len=200)))
*

Is there a simpler way to get rid of axes, frame, and axis labels than
image(x, y, z, col = gray(seq(0, 0.9, len = 200)), asp = 1, xaxt =
'n', yaxt = 'n', bty = 'n', ann = F)

?

Professor Michael Kubovy

University of Virginia

Department of Psychology

USPS: P.O.Box 400400 Charlottesville, VA 22904-4400 Parcels: Room 102 Gilmer Hall McCormick Road Charlottesville, VA 22903 Office: B011 +1-434-982-4729 Lab: B019 +1-434-982-4751 Fax: +1-434-982-4766

WWW: http://www.people.virginia.edu/~mk9y/

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Thu Jan 04 11:44:52 2007

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