Great! This really helped! One quick follow-up -- is there a trick to placing a label wherever the line intersects the x-axis (either above or below the plot)?
On Tue, Jan 22, 2013 at 11:49 PM, PIKAL Petr <petr.pi...@precheza.cz> wrote: > Hi > This function adds line to each panel > > addLine <- function (a = NULL, b = NULL, v = NULL, h = NULL, ..., once = F) > { > tcL <- trellis.currentLayout() > k <- 0 > for (i in 1:nrow(tcL)) for (j in 1:ncol(tcL)) if (tcL[i, > j] > 0) { > k <- k + 1 > trellis.focus("panel", j, i, highlight = FALSE) > if (once) > panel.abline(a = a[k], b = b[k], v = v[k], h = h[k], > ...) > else panel.abline(a = a, b = b, v = v, h = h, ...) > trellis.unfocus() > } > } > > > addLine(v=2, col=2, lty=3) > > Petr > > > -----Original Message----- > > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > > project.org] On Behalf Of Jonathan Greenberg > > Sent: Tuesday, January 22, 2013 11:42 PM > > To: r-help > > Subject: [R] Adding a line to barchart > > > > R-helpers: > > > > I need a quick help with the following graph (I'm a lattice newbie): > > > > require("lattice") > > npp=1:5 > > names(npp)=c("A","B","C","D","E") > > barchart(npp,origin=0,box.width=1) > > > > # What I want to do, is add a single vertical line positioned at x = 2 > > that lays over the bars (say, using a dotted line). How do I go about > > doing this? > > > > --j > > > > -- > > Jonathan A. Greenberg, PhD > > Assistant Professor > > Global Environmental Analysis and Remote Sensing (GEARS) Laboratory > > Department of Geography and Geographic Information Science University > > of Illinois at Urbana-Champaign > > 607 South Mathews Avenue, MC 150 > > Urbana, IL 61801 > > Phone: 217-300-1924 > > http://www.geog.illinois.edu/~jgrn/ > > AIM: jgrn307, MSN: jgrn...@hotmail.com, Gchat: jgrn307, Skype: jgrn3007 > > > > [[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. > -- Jonathan A. Greenberg, PhD Assistant Professor Global Environmental Analysis and Remote Sensing (GEARS) Laboratory Department of Geography and Geographic Information Science University of Illinois at Urbana-Champaign 607 South Mathews Avenue, MC 150 Urbana, IL 61801 Phone: 217-300-1924 http://www.geog.illinois.edu/~jgrn/ AIM: jgrn307, MSN: jgrn...@hotmail.com, Gchat: jgrn307, Skype: jgrn3007 [[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.