search for: grobs

Hello! Don't quite understand how can I delete grobs and simultaneously erase graphic output they produce. I first change grob's "vp" field to null (grid.edit(gr,vp=NULL)) to erase it and then call rm(gr) (as grobs are external pointers I'm not shure what this method actually frees allocated memory). May be there is simpler meth...

Hello! Don't quite understand how can I delete grobs and simultaneously erase graphic output they produce. I first change grob's "vp" field to null (grid.edit(gr,vp=NULL)) to erase it and then call rm(gr) (as grobs are external pointers I'm not shure what this method actually frees allocated memory). May be there is simpler meth...

If I run the following example from: http://www.stat.auckland.ac.nz/~paul/grid/doc/grobs.pdf > grid.newpage() > pushViewport(viewport(w = 0.5, h = 0.5)) > myplot <- gTree(name = "myplot", children = gList(rectGrob(name = "box", + gp = gpar(col = "grey")), xaxisGrob(name = "xaxis"))) > grid.draw(myplot) > grid.edit("myplot:...

Dear all, I'm trying to access and modify grobs in a ggplot2 plot. The basic idea for raw Grid objects I understand from Paul Murrell's R graphics book, or this page of examples, http://www.stat.auckland.ac.nz/~paul/grid/copygrob/copygrobs.R However I can't figure out how to apply this to a ggplot (basically I don't know how...

...how to use key and indicates that legend needs to be used if multiple keys are needed. However, it gives only a brief description of what the grob needs to contain to do multiple keys. I've only used the occasional grid function in panel functions, so I don't have much of a sense of how grobs are constructed. I've been unable to find examples of code used to do multiple keys and would appreciate being pointed in the direction of some. TIA -- Patrick Connolly HortResearch Mt Albert Auckland New Zealand Ph: +64-9 815 4200 x 7188 ~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~...

...e recursion / options(expressions=)? > str(grid.ls(print=FALSE)) Error: evaluation nested too deeply: infinite recursion / options(expressions=)? > traceback() ...etc... ...etc... ...etc... 13: gridList.default(X[[2L]], ...) 12: FUN(X[[2L]], ...) 11: lapply(display.list[1:dl.index], gridList, grobs = grobs, viewports = viewports, fullNames = fullNames, recursive = recursive) 10: gridList.default(X[[2L]], ...) 9: FUN(X[[2L]], ...) 8: lapply(display.list[1:dl.index], gridList, grobs = grobs, viewports = viewports, fullNames = fullNames, recursive = recursive) 7: gridList.default(...

I'm trying to create a layout with named viewports that I can use for other functions. I create the viewport tree that I want, and a list of grobs with the viewports describing where they should go. library(grid) vp <- vpTree( viewport(layout=grid.layout(2,2), name="layout"), children=vpList( viewport(layout.pos.col = 1, layout.pos.row=1, name="tl"), viewport(layout.pos.col = 2, layout.pos.row=2, name="br&qu...

...me changes to the plot using grid graphics functions. These changes show up on the display OK, but when I save using ggsave() the grid changes do not show up. How do I save the plot with these changes? Thanks in advance. -- View this message in context: http://www.nabble.com/ggplot2%3A-Changes-to-grobs-not-saved-to-file-output-tp19220492p19220492.html Sent from the R help mailing list archive at Nabble.com.

Dear list, As a minimal test of a more complex grid layout, I'm trying to find a clean and efficient way to arrange text grobs in a rectangular layout. The labels may be expressions, or text with a fontsize different of the default, which means that the cell sizes should probably be calculated using grobWidth() and grobHeight() as opposed to simpler stringWidth() and stringHeight(). (Correct?). The input of this function...

Hi, I want my xyplot legend to be flat, not tall, and there seems to be no way for xyplot's auto.key and key elements to do this: I tried many, many permutations of what I could find in the archives and reading the documentation. If there there's a way to make it flat, please tell me what the magic incantation is. Here's a simple example of what I like to see. The xyplot will be a

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

Dear list, I'm trying to arrange various grid objects on a page using a frameGrob. It works fine with basic grobs (textGrob, gTree, etc.), and also with ggplot2 objects using the ggplotGrob() function. I am however stuck with lattice. As far as I understand, lattice produces a list of class trellis, which is eventually displayed using the plot.trellis method. I am not sure if/how one can convert this list into...

...d <- expand.grid(x=1:nrow(gm), y=1:ncol(gm)) do.call(gList,mapply(function(x,y) editGrob(gm[[x,y]], vp=vp_path(x, y, type)), grid$x, grid$y, SIMPLIFY=FALSE)) } vp_path <- function(row, col, type) { vpPath("layout", paste(type, row, col, sep="_")) } to place a matrix of grobs into a similar looking matrix of viewports (constructed by another function). This works fine if the matrix contains different grobs, but only draws one if they are all the same (obviously due to the copy by reference nature of grobs). What's a better way of doing this? Most of the time the g...

Dear list, Can someone explain why the childNames below gives character(0) instead of the (canonical) names of the children grobs of the xaxis gTree ? [1] "major" "ticks" "labels" Many thanks in advance, Tobias ### minimal example code ### library(grid) pushViewport(plotViewport(c(5,4,4,2))) pushViewport(dataViewport(1:5, 1:5)) grid.points(1:5, 1:5) grid.xaxis(name = "xa") grid.ge...

Dear All, I continue trying to get several of my plotting functions to use ggplot, because I really do like the concept of the graphical objects, and working with them in the abstract. I am now trying to access the grobs to manipulate using grid. However, until now all I managed was to get the plot as a gTree object, and manipulate it as a gTree from there. The problem is that then it is no longer a ggplot, and thus I can no longer use the ggplot functions. How to get at the grobs, without converting the ggplot...

Hi All, I am trying to find out how to access the components of a ggplot plot, and I found this reply from Paul Murrel http://www.nabble.com/navigating-ggplot-viewports-tt14826352.html#a15056223. I tried it, and it works. However, I am trying to develop some functions that will do the drawing "automatically", and usually I will not know the full name of the grob that has the layout vp,

...ry(grid) e <- rectGrob() # OR: # e <- environment() a <- matrix(list(e), ncol = 1, nrow = 2) b <- matrix(ncol = 0, nrow = 2) cbind(a, b) cbind(a, b) This reliably crashes R for me. I realise this is a rather esoteric error condition, but it crops up for me when creating matrices of grobs to be turned into a ggplot2 plot. Hadley -- http://had.co.nz/

I am having a problem in editing a grob. It works ok if I try to shift the grob using npc coordinates but if I do the same thing using native coordinates the grob disappears. What is wrong? library(grid) grid.newpage() # create viewport pushViewport(viewport(xscale = c(100,200), name = "X")) # draw vertical line grid.lines(150, 0:1, default.units = "native", name =

Dear all, I use the following to create a list of identical grobs, require(grid) rep.grob <- function(g, n){ replicate(n, g, simplify=FALSE) } This approach suffers two problems: 1- R CMD check is not happy about the S3-like name. How can / Should I make this a real S3 method? 2- I don't know if this is the most efficient way to do it. Suggestions ar...

Dear list, The dichromat package defines a dichromat function which "Collapses red-green color distinctions to approximate the effect of the two common forms of red-green colour blindness, protanopia and deuteranopia." library(dichromat) library(grid) colorStrip <- function (colors = 1:3, draw = TRUE) { x <- seq(0, 1 - 1/length(colors), length = length(colors)) y <-