You can rotate the viewport to flip around the horizontal axis, library(grid) grid.text("Chiral") grid.text("Chiral", vp=viewport(angle=180, y=unit(0.5,"npc")-unit(1,"line")))
HTH, b. On 23 May 2012 05:34, Thomas Zumbrunn <t.zumbr...@unibas.ch> wrote: > Maybe my question was not concise enough. I was referring to objects created > with the "package "grid" (also called "grobs"), not to the function "grid" > from package "graphics". For instance, let's say I have a polygon createad > with grid::polygonGrob and want to mirror it along a specified axis. Of course > one could transform the polygon's coordinates, but I was hoping that there is > some more generic way of doing this (and that this could e.g. also be done > with text grobs). > > Cheers > /thomas > > > > On Tuesday 22 May 2012, Rui Barradas wrote: >> Hello, >> >> Just flip 'xlim' or 'ylim'. Or both. >> Using the iris example in help("grid"), make the following changes: >> >> >> op <- par(mfcol = c(2,2)) # Two columns, first is the original, second >> flipped. >> >> with(iris, >> >> [... etc ...] >> # row 1, col 2: flip x axis >> plot(Sepal.Length, Sepal.Width, col = as.integer(Species), >> xlim = c(8, 4), ylim = c(2, 4.5), panel.first = grid(), >> main = "with(iris, plot(...., panel.first = grid(), ..) )") >> # row 2, col 2: flip y axis >> plot(Sepal.Length, Sepal.Width, col = as.integer(Species), >> xlim = c(4, 8), ylim = c(4.5, 2), >> panel.first = grid(3, lty=1,lwd=2), >> main = "... panel.first = grid(3, lty=1,lwd=2), ..") >> >> [... etc ...] >> ) >> par(op) >> >> >> Hope this helps, >> >> Rui Barradas >> >> Thomas Zumbrunn-3 wrote >> >> > Hi everyone >> > >> > I'd like to flip grobs (grid graphical objects) along an axis, e.g. flip >> > grobs >> > horizontally or vertically. I couldn't find any hints, neither in the >> > documentation nor by searching the web. Does anybody know how to achieve >> > this? >> > >> > Cheers >> > /thomas >> > >> > ______________________________________________ >> > R-help@ 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. >> >> -- >> View this message in context: >> http://r.789695.n4.nabble.com/package-grid-mirror-grob-objects-along-an-ax >> is-tp4630866p4630870.html Sent from the R help mailing list archive at >> Nabble.com. >> >> ______________________________________________ >> 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. > > > -- > Thomas Zumbrunn, PhD > Clinical Trial Unit (CTU) > Universitätsspital Basel > Schanzenstr. 55, CH-4031 Basel > Tel +41 (0)61 556 52 92 > Fax +41 (0)61 265 94 10 > http://www.clinicaltrialunit.ch/ > > ______________________________________________ > 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. ______________________________________________ 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.