similar to: image color analysis

say I have a matrix and lists like x <- matrix(c(12.1, 3.44, 0.1, 3, 12, 33.1, 1.1, 23), nrow=2) x.list <- lapply(seq_len(nrow(x)), function(i) x[i,]) if I want a column of the matrix x, I write x[, 2] for example. But how can I do something similar for a set of lists, x.list, above? > x.list [[1]] [1] 12.1 0.1 12.0 1.1 [[2]] [1] 3.44 3.00 33.10 23.00 unlist(x.list)[,2] does

Has anyone plotted or is it possible to plot CIE *xy* chromaticity diagram http://en.wikipedia.org/wiki/File:CIE1931xy_blank.svg I need this plot in color. ishida [[alternative HTML version deleted]]

version.string R version 2.15.2 (2012-10-26) I am trying to install biOps on MacOS X 10.8.2 First, I have tiff, fftw-3, jpeg and set paths like cd /usr/include sudo ln -s /usr/local/include/fftw3.h for x in /usr/local/include/j*.h; do sudo ln -s $x; done for x in /usr/local/include/tiff*.h; do sudo ln -s $x; done cd /usr/lib for x in /usr/local/lib/libfftw3.*; do sudo ln -s $x; done for x in

I need to develop a simple list manipulation. Although it seems easier to do it in matrix form, but I need it in list form. I have a matrix x <- matrix(c(12.1, 3.44, 0.1, 3, 12, 33.1, 1.1, 23), nrow=2) for list form example, the conversion is x.list <- lapply(seq_len(nrow(x)), function(i) x[i,]) ### list version calcnorm=function(a, b){ diff <- mapply("-", a, b)

Hi there, I try to plot visible light spectrum (380nm~780nm) with color corresponding to the specific wavelength. However, I don't find a function that could do this. Another question, it's possible to plot a color space chromaticity diagram like this: http://upload.wikimedia.org/wikipedia/commons/thumb/0/02/CIExy1931.svg/300px-CIExy1931.svg.png Thanks in advance! Jinsong

Hi, I am looking for a R package which is capable to process and analysis pictures of tissues (stained) in an automatic way. I had a look on biops and EBImage (Bioconductor) but they are not automatic... Did you already use/know a such package ? Thanks, - Martial _________________________________________________________________ Tchattez en direct en en vidéo avec vos amis !

Hi, I installed biOps on my XP, and installed the required dll packages, jpeg62.dll, libfftw3-3.dll, and libtiff3.dll, as suggested by this forum. Then it worked perfectly for about one week till this afternoon. When I tried to load biOps again, I got the following error message again Error in inDL(x, as.logical(local), as.logical(now), ...) : unable to load shared library

I have tried several times to load biOps package after reading the posts in this archive regarding the necessity of placing these two libs in the PATH (libjpeg62.dll and libtiff3.dll). I have tried locating the libs in several directories that should have worked, but I still get the following message. ------------------ Error in inDL(x, as.logical(local), as.logical(now), ...) :

I installed the (binary) biOps package, which can use libtiff and libfftw. Then I used macports to install the libraries (in /opt/local/lib). But I restart R and biOps still does not see the libraries. I've tried adding symbolic links from /opt/local/lib to /usr/local/lib, I've added /opt/local/lib to LIBRARY_PATH, LD_LIBRARY_PATH, and DYLD_LIBRARY_PATH, and it doesn't work. Do you

I'm running R 2.6.1 on a WXP machine. When I do the following I get an error message. > library(biOps) Error in dyn.load(file, ...) : unable to load shared library 'C:/PROGRA~1/R/R-26~1.1/library/biOps/libs/biOps.dll': LoadLibrary failure: The specified module could not be found. Error: package/namespace load failed for 'biOps' Please help, or comments about what

All, the MacOSX binary build of the biOps package is broken on cran, so I am trying to compile from source. I am very close; the trick is apparently that this package depends on fftw3, libjpeg and libtiff. My fftw3 is in /usr/local/, but my libjpeg and libtiff are in /opt/local/ since i got them through macports. In general, I'd like to keep as many of my third-party libraries as I can in the

Hello, I'm running R with windows. Could anybody help me how to install the package biOps (http://cran.mirroring.de/src/contrib/Descriptions/biOps.html) ? I cannot find it at any mirror provided by the GUI; I just found it as "tar.gz" which cannot be installed with the installation method... Maybe, I simply do something wrong? Thanks for any hint! Antje

hi. I have a list like x <- list(1:10,11:20,21:30) It's a sort of a 3 x 10 matrix in list form. I would like to reduce the dimension of this list. it would be something like list(1:3, 11:13, 21,23) I tried x[,1:3] does not work of course. Neither lapply(x, [1:3]) works... Any suggestions? ishida [[alternative HTML version deleted]]

Is it possible to read jpeg files into R? If yes please guide, Thanks.. I tried to search many time but failed to do. Thankis in advance.. with Best Regards, Malik Shahzad Visiting Researcher National Institute of Informatics (NII) Tokyo, Japan Doctoral Student Asian Institute of Technology (AIT) Bangkok, Thailand +66-8-7676-5616 [[alternative HTML version deleted]]

Hello everyone,  I'm working in a project to create an special analysis about visualization in some animals and its behaviour, through checking eye movement. The point is this is very important to get data from the image as a resume of what this animal sees. I think an RGB histogram like photoshop does, but I need to get the data from this histogram analysis and I was wondering about using R

Hi all, Am I using the correct syntax to set a custom R_LIBS when running R CMD INSTALL from the command line? I get: R_LIBS=/Users/hadley/R-dev R CMD INSTALL aL3xa-rapport-08e68ca/ # Desktop : R_LIBS=/Users/hadley/R-dev R CMD INSTALL aL3xa-rapport-08e68ca/ # * installing to library ?/Users/hadley/R? # ERROR: dependency ?ascii? is not available for package ?rapport? But: ls

Hi, I installed biOps on my XP, and installed the required dll packages, jpeg62.dll, libfftw3-3.dll, and libtiff3.dll, as suggested. Then it worked perfectly for about one week till this afternoon. When I tried to load biOps again, I got the following error message again Error in inDL(x, as.logical(local), as.logical(now), ...) : unable to load shared library

Dear list, I'd like to ask for some advice in creating a wrapper function for this C code, http://www.fourmilab.ch/documents/specrend/ http://www.fourmilab.ch/documents/specrend/specrend.c I could probably port it in R, but I've been hoping to use compiled code for a while and this looks like a good test case. Unfortunately, the only success I've had so far is with the too

Buenas dias a tod@s, Quisiera saber si alguien tiene experiencia con el procesamiento de imágenes (en formatos JPEG o PNG) en R y la búsqueda de similitudes / diferencias entre ellas. La idea de lo que me gustaría hacer es: tomar una imagen, cargarla en R y luego analizar su estructura. Para las dos primeras tareas, la libreria ReadImages en CRAN me ha sido útil, pero para la segunda, hasta

Dear All, I found this nice example of PCA application on the web http://www.r-bloggers.com/principal-components-and-image-reconstruction/ and wanted to reproduce the results for myself. I installed biOps the usual way and got the message *package 'biOps' successfully unpacked and MD5 sums checked* but when loading the package, I get *Error in inDL(x, as.logical(local),