search for: dvrecko

Hi. I'm a student at Simon Fraser University in British Columbia, Canada. I can't for the life of me figure out how to plot a 3D surface (A 3D response surface to be more specific) in R. I found your email address on a web board, and saw someone mention wireframe(), but using the help in R yielded no results. Any suggestions? Thanks. Dean Vrecko

Hi. I'm a student in a graduate program at Simon Fraser University in Canada. I am trying to run a simple screening experiment with some simulated data. I simply want to do an ANOVA of an experiemnt with 5 factors (4 have 2 levels, the last has 3 levels) and 48 runs (ie, full factorial). The thing is that I have multiple observations for each level combination (run). So, 1) How do I do

..."as if it was on a *_new_* device". Alternatively the 'lattice' package can produce a wide range of plots. Then try the various contributed documents that exist on the CRAN mirrors to further your knowledge. It's all there. Tom Mulholland -----Original Message----- From: dvrecko at sfu.ca [mailto:dvrecko at sfu.ca] Sent: Monday, 29 November 2004 9:35 AM To: r-help at stat.math.ethz.ch Subject: [R]: Adding a line in the graph of 'plot()' Hello. I'm looking for a way to add a line in a plot of a points that should lie along a particular line. Can I add a line...

Hi. I'm a student at SFU in Canada. The basic thing I want to do is calculate means of different strata. I have 2 vectors. One has the values I want to take the means from, the other is the four strata I am interested in. So I essentially want to break up the information vector into the four strata and calculate four means, one for each stratum. How can I do this in a reasonable way? Thanks

Hi. I'm sure this is a simple problem, yet I can't seem to get simple help for it. I am simply trying to move my xlab in plot(). I am currently using the following commands: plot(c(-0.25,18),c(0, max(patient10)),type="n", ylab="SD of POST estimator", xlab="Scans \n (a)") But when the plot prints, the xlab is printed over top the xaxis. I tried adjusting

Hello. I'm looking for a way to add a line in a plot of a points that should lie along a particular line. Can I add a line to the 'plot()' function, maybe using 'abline()' so that the line is visible in the graph of 'plot()'? How? More generally, can I overlay plots over one another? Thanks. Dean Vrecko Simon Fraser University