Quoting "Glynn, Earl" <[EMAIL PROTECTED]>: > Prof Ripley: > > Thank you for your prompt reply. > > > It's pure convention: see below. > > > > Did you try reading the help for image? You don't seem to > > understand it > > if you actually did. It seems you are looking for > > > > image(t(x)[ncol(x):1, ]) > > I think you guys are too close to "R" to understand how hard it is to > use sometimes. What may be blatantly obvious to you is quite a problem > especially to beginners. Some of us may be beginners to R, but we know > math, science, programming, and how to solve problems with other tools > and languages. > > I re-read the guidelines before posting fearing condemnation. > > Before posting I searched the online R-help Google interface with > keywords "image", "flip", "rotate". A discussion from 1998 touched on > this issue but I was hoping that this was deemed a "bug" at some point > and fixed -- or had an easy workaround, like some parameter I was > missing. > > I read the "?image" help before posting. Was the part I didn't > understand buried in this "note"? > > "Based on a function by Thomas Lumley [EMAIL PROTECTED]"
You seem to be thinking that Prof Ripley's solution had something to do with image(). It doesn't, it has to do with manipulating a matrix. image() visualizes a matrix in a particular and well-defined way. You want your matrix to be shown in a different way, and one (simple) way of doing that is to convert your matrix into a different matrix, on which calling image would give you what you want. Why would this be explained in ?image ? This is basic R. More generally, I think your frustration is caused by your expectation that a matrix object should behave like a bitmap image. It doesn't. If you want work with images, use the pixmap package. Deepayan ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html