Greg, > The rimage package has functions for reading in and plotting > jpeg files that you could use for displaying the photograph. > If you then can find 2 points in the image (not on the same > horizontal or vertical line) for which you know the > coordinates in the coordinate system that you want to plot > in, then you can use the updateusr function from the > TeachingDemos package to set the user coordinates, then use > points/lines or other functions that can add to the current > plot (e.g. contour with add=TRUE) to overlay the information > of interest to the plot.
I tried this, and your approach works great except for one thing. I would like to plot to a pdf device, and when I do so my grayscale image takes on a gridded appearance, with thick horizontal and vertical lines of lighter gray. These don't appear of course if I use jpeg() instead of pdf(). How can I get rid of those? Thanks, Scott Waichler [EMAIL PROTECTED] ______________________________________________ R-help@r-project.org 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.
