Nope, this assigns the 26th, 28th, 30th anf 32nd point of the total nrow(matrix) number of points. This does not assign the points (or places of the x-axis) with such a rowname.
row number <-> row name 1:nrow(matrix) <-> rowname(matrix[1]) .. rowname(matrix[nrow(matrix)]) I try to rephrase my question: how do you plot a curve into a plot when the x-axis isn't the rownumbers, but each row is a real x-value (e.g. 35.23)? p.s. there is a mistake in my original (first) email. Instead "at=NULL" should be "at=Labels" (otherwise there is an error message). Sorry for confusion. On Mon, Jul 14, 2008 at 5:53 PM, stephen sefick <[EMAIL PROTECTED]> wrote: > try at=seq(from=26, to=32, by=2) in the axis statment > hope this helps > > Stephen > > On Mon, Jul 14, 2008 at 11:21 AM, Zroutik Zroutik <[EMAIL PROTECTED]> > wrote: > >> Dear R-users, >> >> I'm tackling with a problem which causing me a head-ache for a long time. >> I >> would like to create a nice x-axis to my plots, but I do not know how to >> implement the method. >> >> Imagine a matrix where you have rownames real numbers -- these rownames >> should be written in the x-axis nicely. I could not find any way how. >> >> I'll describe what I'm doing now: >> I have a matrix where each column is an independent curve (number of the >> columns 3-4). The rownames are the x-axis, and the names are real numbers >> (converted to chars, of course). I find the max and the min among the >> values >> in the matrix (for the y-axis) and I'm creating an empty plot. x-axis is >> c(0, nrow(matrix)). Now, I'm creating the x-axis labels >> >> Labels <- seq(1, nrow(matrix), by = 100) >> axis(1, at = NULL, labels = rownames(matrix)[Labels]) >> >> At this point I'd like to have instead of "24.12333 26.45667 28.79 >> 31.12333 33.45667" at the x-axis, an optimally placed ticks at let's >> say >> "26 28 30 32" -- this is what I cannot achieve. >> >> Afterwards I'm plotting the curves in different colours. I know that the >> x-values are accessed by the number of their row and not rowname. >> >> Anybody could point me into some direction, please? Thank you upfront! >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> 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. >> > > > > -- > Let's not spend our time and resources thinking about things that are so > little or so large that all they really do for us is puff us up and make us > feel like gods. We are mammals, and have not exhausted the annoying little > problems of being mammals. > > -K. Mullis [[alternative HTML version deleted]] ______________________________________________ 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.
