similar to: possible bug: graphics::image seems to ignore getOption("preferRaster")

Hi R-help list What is the threshold for the `useRaster` argument of graphics::image() to decide whether a grid is "regular" or not (i.e. the usage of useRaster=T is allowed or not). My `dev.capabilities("rasterImage")$rasterImage` is "yes". I could not find this information in the internet. I also could not find the source code of the graphics::image() function (I

Has anyone yet tried incorporating rasterImage into the base image() function? It seems to make a *huge* difference, with a very small number of added/changed lines of code. (Of course I have barely tested it at all.) Is there any reason this *shouldn't* go into the next release? > source("image.R") > z <- matrix(runif(1e6),nrow=1000) > image(z) >

I noticed some undocumented and inconsistent behavior in device_Raster when a plot is produced with reflected axes such as: image(volcano, xlim = c(1,0), useRaster = TRUE) image(volcano, ylim = c(1,0), useRaster = TRUE) The `pdf` device will perform horizontal and vertical reflections, while `quartz` will ignore the transformations when plotting to the screen, but when plotting to a

Hello, I have a data frame which looks like > head(d) a1 a2 n j col 1 1 1 88341002 11 #E7E7E7 2 1 2 25094882 11 #E7E7E7 3 1 3 16916246 11 #E7E7E7 4 1 4 14289229 11 #E7E7E7 5 1 5 11945929 11 #E7E7E7 6 1 6 8401235 11 #E7E7E7 The values in 'j' run from 1 to 11. I would like to plot the point (a1,a2) with color given by j I tried mi <-

Hello, I have been exploring the possibility to transition some code that currently uses image() to use the new rasterImage(). To date, I haven't been able to specify a color look-up strategy that works. For example... nx <- 100 ny <- 100 m <- matrix(data = rep(seq(0,1, length = nx), ny), ncol = nx, nrow = ny, byrow = TRUE) plot(1:nx, 1:ny, type = "n") my.color

Dear all, This may be specific to Mac, I haven't had 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

I am working on dumping raster data from R into PNG files using rasterImage(). I am working with a test matrix from the rasterImage() example and using it to produce a PNG image with the following code: # From the example for rasterImage(). A 3 pixel by 5 pixel b/w checkerboard. testImage <- as.raster(0:1, nrow=3, ncol=5) testImage [,1] [,2] [,3] [,4] [,5] [1,]

I am working on dumping raster data from R into PNG files using rasterImage(). I am working with a test matrix from the rasterImage() example and using it to produce a PNG image with the following code: # From the example for rasterImage(). A 3 pixel by 5 pixel b/w checkerboard. testImage <- as.raster(0:1, nrow=3, ncol=5) testImage [,1] [,2] [,3] [,4] [,5] [1,]

Dear, I can't plot legend over a Rasterlayer. My system is MAC OS Lion. See my problem: ####### Data > img class : RasterLayer dimensions : 5, 5, 25 (nrow, ncol, ncell) resolution : 0.002245, 0.002245 (x, y) extent : -48.33875, -48.32753, -20.35756, -20.34634 (xmin, xmax, ymin, ymax) coord. ref. : +proj=longlat +datum=WGS84 +no_defs +ellps=WGS84 +towgs84=0,0,0

Hi, When R generates density plots and these are exported to postscript( a=matrix(1:100,10,10);image(a,col=rainbow(100);dev.copy2eps(file="image.eps") ) The result often looks bad when rendered on screen. The help page states that this is because programs use anti-aliasing. That seems to be true - turning off anti-aliasing for gs (-dGraphicsAlphaBits=1) of in OSX's preview makes

I was pointed to the Cairo package for plotting PNG images on a device. I've been playing around with it, but found that after I use the rasterImage function, I can't add anything any more to the device, eg : img <- readPNG(system.file("img", "Rlogo.png", package="png")) r = as.raster(img[,,1:3]) r[img[,,4] == 0] = "white" CairoWin()

Hi, I have a matrix that I am displaying via image. I would like to obtain an image where the columns are 'grouped' (I have a grouping variable). But I am not sure how how I can draw the lines to indicate the grouping in the margin. I realize this is essentially waht heatmap does but as I have a set of custom breaks and colors I wanted to generate this via image. I can see that it is a

Hello R-Help, I want to be able to read in a raster image, plot it with grid.raster or rasterImage and save the image with one pixel per a pixel element from my array. Saved preferably in a common image format. The real goal of my question is to eventually read in images with text on them, manipulate them with my controlled functions, save them without changing the image dimensions, and perform

Hi, I have a plot and I would like to overlay a PNG image over it. I'm using the rasterImage function to do this, but the problem I'm facing is working out the coordinates of the upper right corner of the final image in user coordinates. That is I can place the image so the lower left is located at the bottom of the y-axis and the left end of the x-axis. Since my image is say 100px x

hello, I need your help for this example > for(k in LR) { + donGeno[[k]] <- as.numeric(levels(factor(subset(don2, Id_Essai == 1006961 & Id_Cara == LC[1] & Id_Rep == k, select = Id_Geno)[,1]))) + print(donGeno[[k]])} [1] 65125 65126 65127 65128 65129 65130 65131 65132 65133 65134 65135 65136 65137 65138 65139 65140 65141 65142 65143 65144 65171 [1] 65126 65127 65128 65129 65130

The build system rolled up R-2.14.2.tar.gz (codename "Gift-Getting Season") at 9:00 this morning. This is intended to be the final round-up release of the 2.14 series; see the list below for details. (The codename is still not part of the actual sources. That feature will have to wait for 2.15.0, "Easter Beagle"). This release also marks the 3rd anniversary of R-1.0.0. You

The build system rolled up R-2.14.2.tar.gz (codename "Gift-Getting Season") at 9:00 this morning. This is intended to be the final round-up release of the 2.14 series; see the list below for details. (The codename is still not part of the actual sources. That feature will have to wait for 2.15.0, "Easter Beagle"). This release also marks the 3rd anniversary of R-1.0.0. You

The byte pixies have rolled up R-2.14.0.tar.gz (codename "Great Pumpkin") at 9:00 this morning. This is a development release with several new features; see the list below for details. You can get it from http://cran.r-project.org/src/base/R-2/R-2.14.0.tar.gz or wait for it to be mirrored at a CRAN site nearer to you. Binaries for various platforms will appear in due course. For

The byte pixies have rolled up R-2.14.0.tar.gz (codename "Great Pumpkin") at 9:00 this morning. This is a development release with several new features; see the list below for details. You can get it from http://cran.r-project.org/src/base/R-2/R-2.14.0.tar.gz or wait for it to be mirrored at a CRAN site nearer to you. Binaries for various platforms will appear in due course. For

Hey Everyone, I'm using Ubuntu and used the Ubuntu Software Center to put R on my computer (version 2.10.1). It has been working great for what I've needed it for. However, I think now that I need a newer version so that a particular function in a new script I'd like to use can be found: rasterImage. My basic question is how do I upgrade from 2.10.1 to 2.12.0? The problems I'm