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If I make a scatterplot and several (e.g. 5) points lie on top of each other at a given x,y location I would like the plot symbol to be the number of superimposed points (e.g. "5"). Could someone please tell me how to do this in R? Thanks! Bill Simpson

I have continuous variables x, y, z. The plot of the data looks like this: y | z=1(o), 2(@), 3(#), 4(*) | |* * * | | |# # # # | | |@ @ @ @ | | o | o | o | o |o ------------------------ x The correct model appears to be: if z==1, y~x+z; else y~z (y~z + z:x isn't it) How can I express this model in lm()?

If I used a groupedData object, if I do fit<-lme(blah) then plot(augPred(fit)) produces a nice trellis plot of the data along with the fitted lines However I find that the lines and the data points are in the same colour (light blue against a medium grey background). Is there a way to make the lines in a different colour (e.g. black)? It would also be nice if the line were plotted after the

...guest account = smbguest [test] comment = Samba test space path = /export/home0/sambatest read only = no guest ok = no browseable = yes inherit permissions = Yes Many thanks in advance! -- Tim Pointing, Systems Manager, DRDC Toronto Toronto, Ontario, Canada Tim.Pointing@drdc-rddc.gc.ca

Hi, I am new to R and I would like to display an image on a plane in a 3D plot, i.e. I would like to be able to specify a theta and a phi parameters like in the function persp to display a 2D image on an inclined plane. Regards, vincent [[alternative HTML version deleted]]

Hi, I am new to R and I would like to display an image on a plane in a 3D plot, i.e. I would like to be able to specify a theta and a phi parameters like in the function persp to display a 2D image on an inclined plane. Regards, vincent [[alternative HTML version deleted]]

I am used to using R under unix. I have a problem with R under Windows-2000: Suppose I have a plain text file code.r full of R code that I want to source into R. My problem is that Windows invisibly tacks ".txt" onto the end of the filename (the name looks like code.r but it is really code.r.txt). How to get windows to both allow me to call it code.r (for real! Not

I have the following situation I want to analyse with prcomp. Each subject has a curve called the contrast sensitivity function (CSF). This curve's overall shape is due to the additive output of 3 "channels" (eigenvectors). #this shows 3 SF channels; net CSF = c1 + c2+c3 x<-1:100 c1<-dnorm(x,mean=20,sd=20) c2<-dnorm(x,mean=50,sd=20) c3<-dnorm(x,mean=80,sd=20)

I used sink() a lot under linux with no problems. Under windows 2000 & using R 1.5.1, I do the following: - use sink() to direct ouput to a file - use sink() again to direct output to screen - print the file (to a network printer) PROBLEM: the file stays spooled infinitely at the printer. Sometimes the spooling gets translated into a printer error. The only way to get any printing working

I am used to using R under unix. I have a problem with R under Windows-2000: Suppose I have a is a plain text file code.r full of R code that I want to source into R. My problem is that Windows invisibly tacks ".txt" onto the end of the filename (the name looks like code.r but it is really code.r.txt). How to get windows to both allow me to call it code.r (for real! Not code.r.txt) and

I have been asked to analyse the results of (what is to me) a very complicated experiment. The dependent measure is the estimated distance, which is measured as a function of the actual distance. There are also several other IVs. The plot of log estimated distance as a function of log distance is linear. So in the rest of the analysis I will use logestimate and logdistance. My plan is to see