search for: rectgrob

Dear R-users, As far as I understand, when one defines the width of a rectGrob call using a 'npc' unit, the width of the object is proportional to the width of the current viewport. Is there a way to refer to the height (or width) of the viewport when defining the width (or height) of the rectGrob object? Thanks Sebastien [[alternative HTML version deleted]]

Hello R friends, I get quite confused in using the grid graphic function grid.pack( ) and grid.frame ( ). Here is a simple example: library(grid) grid.frame(name="frame1") grid.pack("frame1",rectGrob(width=unit(0.5,"npc"), height=unit(0.5,"npc"), gp=gpar(col="red"))) what I expect is a rectangle with half the default device's dimensions,but it returns a rectangle like 1/4 of the device.why? In addition wonder what the rectGrob is referred to if there are x.y...

Dear all, In an attempt to draw fill patterns in grid graphics, I have encountered a behavior of grobX that I cannot understand from the documentation. Consider this, library(grid) ## gTree g1 <- gTree(children=gList( rectGrob(0.5,0.5, width=unit(0.8,"npc"), height=unit(2,"cm")), circleGrob(r=0.3)), vp=viewport(0.5,0.5)) ## gList g1 <- gList(rectGrob(0.5,0.5, width=unit(0.8,"npc"), height=unit(2,"cm")), circleG...

Dear all, I'm puzzled by the behavior of stringHeight in the grid package. Consider the following test, library(grid) test <- function(lab="dog", ...){ g1 <- textGrob(lab) g2 <- rectGrob(height=grobHeight(g1), width=grobWidth(g1)) gg <- gTree(children=gList(g1,g2), ...) print(c("height:", convertUnit(stringHeight(lab), "mm", "y"))) grid.draw(gg) } grid.newpage() test() test(expression(dog), vp=viewport(x=0.6)) ## notice how the dog's tai...

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::xaxis", at = 1:10/11) > grid.edit("myplot::xaxis::labels", label = round(1:10/11, 2)) > grid.edit("myplot::xaxis::labels&...

...d a chance to test another platform. Consider this, plot(1,1,t="n") rasterImage(matrix(1),1,1,1,1) library(grid) grid.rect(gp=gpar(fill="grey")) The grid.rect covers the full device window as expected. However, when I resize the window ever so slightly (interactive device) the rectGrob is suddenly clipped to the previous plot window. I cannot understand this behavior, and it doesn't happen if one removes the rasterImage() call, so I suspect something iffy is going on with the display list or something. The only device I've tried is quartz(), x11() crashed with rasterImag...

...here 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") ) ) grobs <- gList( rectGrob(vp="tl"), textGrob("Top left", vp="tl"), textGrob("Bottom right", vp="br") ) I can draw the grobs using the following code: grid.newpage() pushViewport(vp) upViewport(1) grid.draw(grobs) But I want a grob that represents those grobs drawn in t...

...ent to use Grid frames, Creating Tables of Text Using grid Paul Murrell July 9, 2003 As a minimal example, I wrote this, gf <- grid.frame(layout = grid.layout(1, 1), draw = TRUE) label1 <- textGrob("test", x = 0, just = "left", name="test") gf=placeGrob(gf, rectGrob(), row = 1, col = 1) gf=packGrob(gf, label1, row = 1, col = 1) grid.draw(gf) grid.edit("test", label = "longer text", grep=T) I'm a bit lost here, as I was expecting the frame to be automatically adjusted to fit the new text. Can anyone point me in the right direction? B...

library(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...

...#39;t understand the rationale in the absolute sizes of the point symbols, and I couldn't find it documented. The example below uses Grid to check the size of the symbols against a square of 10mm x 10mm. > checkOneSymbol <- function(pch=0){ > gTree(children=gList( > rectGrob(0.5, 0.5, width=unit(10, "mm"), height=unit(10, > "mm"), > gp=gpar(lty=2, fill=NA, col=alpha("black", 0.5))), > pointsGrob(0.5, 0.5, size=unit(10, "mm"),pch=pch, > gp=gpar(col=alpha("red", 0.5))) > ))...

...#39;t understand the rationale in the absolute sizes of the point symbols, and I couldn't find it documented. The example below uses Grid to check the size of the symbols against a square of 10mm x 10mm. > checkOneSymbol <- function(pch=0){ > gTree(children=gList( > rectGrob(0.5, 0.5, width=unit(10, "mm"), height=unit(10, > "mm"), > gp=gpar(lty=2, fill=NA, col=alpha("black", 0.5))), > pointsGrob(0.5, 0.5, size=unit(10, "mm"),pch=pch, > gp=gpar(col=alpha("red", 0.5))) > ))...

...ol, just=just, widths = widths, heights = heights) ) label.ind <- 1 # index running for the vector of labels for (ii in seq(1, ncol, 1)) { for (jj in seq(1, nrow, 1)) { gcells = placeGrob(gcells, rectGrob(gp=gpar.fill, name=paste("cells-fill-r",ii, "-c",jj,sep="")), row=jj, col=ii) text.grob.ij = textGrob(label=e[label.ind], gp=gpar.text, name=paste("cells-label-r",ii, "-c",jj,sep="&quot...

Dear R-Help I have some trouble to set the legend in a xyplot into two rows. The code below gives me the legend in the layout I am looking for, I just rather have it in two rows. library(lattice) schluessel <- list( points=list( col="red", pch=19, cex=0.5 ), text=list(lab="John"), lines=list(col="blue"),

Hi, I wanted to generate a plot which is almost like the plot generated by the following codes. category <- paste("Geographical Category", 1:10) grp1 <- rnorm(10, mean=10, sd=10) grp2 <- rnorm(10, mean=20, sd=10) grp3 <- rnorm(10, mean=15, sd=10) grp4 <- rnorm(10, mean=12, sd=10) mydat <- data.frame(category,grp1,grp2,grp3,grp4) dat.m <- melt(mydat) p <-

...) })) b.gen <- setRefClass("classB", contains = "classA") library(grid) my.vps <- vpTree(viewport(name = "parent"), vpList(viewport(name = "child"))) my.gtree <- gTree(name = "tree", children = gList(rectGrob(vp = "parent"), textGrob("test", vp = "child"))) a <- a.gen$new(vps = my.vps, gt = my.gtree, nums = 11:20) b <- b.gen$new() a$view() b$view() # Everything works as expected so far... # Now lets try importing the fields from a...

I am trying to create a lattice plot and would like to later, i.e. after the plot is drawn, add a grey rectangle behind a portion of it. The following works except that the rectrangle is on top of and obscures a portion of the chart. I also tried adding col = "transparent" to the gpar list but that did not help -- I am on windows and perhaps the windows device does not support

Hi This is for developers of extension packages that provide extra *graphics devices* for R. In the *development* version of R, support has been added to the graphics engine for sending raster images (bitmaps) to a graphics device. This consists mainly of two new device functions: dev_Raster() and dev_Cap(). The R_GE_version constant (in GraphicsEngine.h) has been bumped up to 6 as a

...9;s class. This allows packages with namespaces to have private (non-exported) classes. o Changes to package 'grid': - Calculation of number of circles to draw in circleGrob now looks at length of y and r as well as length of x. - Calculation of number of rectangles to draw in rectGrob now looks at length of y, w, and h as well as length of x. - All primitives (rectangles, lines, text, ...) now handle non-finite values (NA, Inf, -Inf, NaN) for locations and sizes. Non-finite values for locations, sizes, and scales of viewports result in error messages. There...

...9;s class. This allows packages with namespaces to have private (non-exported) classes. o Changes to package 'grid': - Calculation of number of circles to draw in circleGrob now looks at length of y and r as well as length of x. - Calculation of number of rectangles to draw in rectGrob now looks at length of y, w, and h as well as length of x. - All primitives (rectangles, lines, text, ...) now handle non-finite values (NA, Inf, -Inf, NaN) for locations and sizes. Non-finite values for locations, sizes, and scales of viewports result in error messages. There...