similar to: how to read individual values from a pixmap object

Hi, I'm having trouble writing .pnm images which I think is due to a problem with my colour space. The pixmap object seems to be looking for 72 of 8 colours (one per cell?) which doesn't seem healthy... > library(pixmap) > x <- pixmapIndexed(rep(1:8, 9), nrow=6, col=rainbow(8)) > x Pixmap image Type : pixmapIndexed Size : 6x12 Resolution : 1x1

Hi I need to overlay two pixmaps (library (pixmap)). One, a pixmapGrey, is the basis, and on this I need to overlay a pixmapIndexed, BUT: the pixmapIndexed has set only some of its "pixels" to an indexed color, many of its pixels should not cover the basis pixmapGrey pixel, means, for this "in pixmapIndexed not defined pixels" it should be transparent. What would you

Dear R users I have a two-dimensional array, whose values I want to plot, using the pixmapGrey class. Plotting works fine, and now I would like to be able to identify some of the points in the plot using identify(). But I get the following message while pressing the left mouse button: > plot(pixmapGrey(fmri.vtc[,,slice,volume])) > identify(fmri.vtc[,,slice,volume]) warning: no point with

Hi R users: I got the following message when I use the pixmap library on R 1.7.0 over w2K platform (on R 1.6.2 it runs right). pixmapGrey(matrix(c(0,1),128,128)) Error in .class1(object) : Object "from" not found I download the library .zip file from: http://cran.r-project.org/bin/windows/contrib/1.7/pixmap_0.3-2.zip Other question: When I try to "Install package(s) from

Hi all, I just downloaded windows binaries of RGDAL (from http://www.stats.ox.ac.uk/pub/RWin/bin/windows/contrib/2.1/) and installed. I ran the example R_HOME\library\rgdal\R-ex\getPixmapGDAL.R and everything seemed to work as expected. However I got the following warning message: DLL attempted to change FPU control word from 8001f to 9001f The R-help (?dyn.load) describes the problem as:

Dear all, I try to figure out how to use R to count the number of pixels of the same color in some gray-level picture. I managed to read it in either tiff or jpeg format, but the returned pixmap object keeps its information out of (my) reach. Is there an easy way to tabulate the different color/graylevel pixels and their numbers? Or should I use a completely different (free) software?

Hola! I will want to identify pixels in an image with the mouse, for so getting the image data from the matrix(es), for use in subsequent discriminant analysis. But the following bombs R: (windows XP, rw1071) > str(baboon) list() - attr(*, "size")= int [1:2] 512 512 - attr(*, "cellres")= num [1:2] 1 1 - attr(*, "bbox")= num [1:4] 0 0 512 512 - attr(*,

Dear R users, in some circumstances, try() shows a strange behaviour, when the pixmap package is loaded. The following piece of code works as expected, if it is either sourced in an interactive session or invoked via R CMD BATCH (the try-error is printed). However, if i invoke R using ``R --vanilla < source.R'', the execution halts (without printing the try-error). # source.R

Hi, my name is Ellen. I want to ask you about R Code. I got a code for extracting a pixel value, but I can't compile it..  It is said "Error in is.data.frame(x) : object 'lena' not found" Here is the original full code: library(pixmap) lena <- read.pnm("oldlennablur.pgm") write.table(lena@grey,"mylenna", quote=FALSE, row.names = FALSE, col.names=

Hi: Goal: use R to turn a matrix of 1's and 0's into a corresponding image (e.g. png) of black and white pixels. Why R: Yes, I can do this more efficiently and precisely with a perl module like Image::PBM. Been there, done that many times, etc. (Just humor me. I'm trying to do this with R for a number of reasons.) Problem:

There is a new package pixmap in $CRAN/src/contrib/Devel which provides a first shot at a class hierarchy for bitmapped images (as both bitmap and image are already taken I named it pixmap ... if somebody has an idea for a better name, please let me know). This is by no means meant to be final ... more like a basis for discussion about classes for that purpose. It already has RGB, indexed and

Full_Name: Wolfgang Huber Version: 1.5.1 OS: Windoof 2000 Submission from: (NULL) (193.174.62.11) Hi, Trying to install the binary distribution (zip file) for the "pixmap" package, as downloaded today from CRAN, I get the following warning "error -1". The package will not be installed. Installation of other packages (e.g. pinktoe, acepack) worked fine. The warning or error

Not clear what the depth % 8 was trying to protect against, but it was breaking 30bpp visuals with DRI3. Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu> --- src/nouveau_dri2.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/nouveau_dri2.c b/src/nouveau_dri2.c index cbb7b2a..07b6022 100644 --- a/src/nouveau_dri2.c +++ b/src/nouveau_dri2.c @@ -1076,7 +1076,7 @@

Not clear what the depth % 8 was trying to protect against, but it was breaking 30bpp visuals with DRI3. Add it in to ensure that bitsPerPixel % 8 is 0, since there is plenty of bpp/8 math in the driver. Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu> --- src/nouveau_dri2.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/src/nouveau_dri2.c b/src/nouveau_dri2.c

I am having trouble running the 'read.pnm' examples in this package. Can anyone tell me what is wrong? I am using the current package and running Redhat 7.2 (intel). The other examples seem fine but I can't seem to pull in files. [root at KENNY root]# R R : Copyright 2001, The R Development Core Team Version 1.3.0 (2001-06-22) R is free software and comes with ABSOLUTELY NO

Is it possible to get pixmaps of minimized windows? I don't want to use ugly hacks like "temp unminimize" just to get it. Stjepan

Dear all, I have been trying to speed up a process we have been done in ArcGIS. We have to read a single layer TIFF (monochrome image) in . For this, I have used the "rtiff" package. After reading the TIFF file, I compared the raw values for each pixel that I have in ArcGIS to the ones obtained in R. In ArcGIS I have discrete values in the range 0..255, while in R I have continuous

Over the years I have noted a couple of people interested in an R package that will read tiff files. There were some valid arguments against (e.g. R is not an image editting suite, libtiff does not support all tiff files, etc.). True enough, when I want to work with family photos, I use Gimp. But in my research I use tiffs as data sets in the context of computational biology and molecular

Dear R-help I want to display an image file in a new plot frame. SVG is my preferred format, but I can also consider PNG, GIF, JPEG, TIFF, and PPM (from ImageMagick). By way of background (although not material to this posting), the image file is generated by a call to 'dot' (part of the 'Graphviz' suite) after the required .dot file has been produced using hand-crafted R code.

I've been doing some testing and it seems that glyphs (typically smaller than a page size on nv50) render slow'ish sometimes, mostly due to the many trips to the kernel (drm_addmap_core is the symbol that shows up). Ofcource this was a benchmark, but it does leave me wondering, do we really need need to call the kernel for every little pixmap? Also from a memory point of view, because a