similar to: Modifying a function

Hi, I'm a newbie in R world. I would like to develop an application that extract contour from objects of an image. - Is R able to manage raster data (i.e., images) ? - Is there a specific package in change of such management ? I'm specificaly interest in the Canny filter. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Emmanuel POIZOT CNAM/INTECHMER B.P. 324 50103 Cherbourg Cedex T?l : 33 (0)2 33

Hi all, I'm writing a program in C++ in witch there should be some graphical outputs. To do so, I would like to use R with the command : R --no-save < cmdfile.R , where I put the R graphic commands in the cmdfile.R file. I call R from my C++ code but as R seems to run in batch mode, there are no graphical outputs! How can I do to get the graphics outputs ? -- Sincerely

I've got two set of data : 22.45 21.56 20.48 19.59 21.52 = A and 22.15 21.98 20.42 20.58 19.61 = B I perform a wilcox.test on this two set wilcox.test(A, B) and I'd this answer: Wilcoxon rank sum test data: A and B W = 12, p-value = 1 alternative hypothesis: true mu is not equal to 0 Should I interpret that there is no difference between the two sets ? -- Cordialement

Dear all, I want make correction depth of a bathymetric data set. To do so, I have the depth data set sample every second (a depth at each second) in one hand, and in the other hand, I have a tide variation level data set sample every 250 ms. The time register in each data sets (tide and bathymetric) is express in seconds followinf this format : hh:mm:ss.ss I would like to rectify the depth

Hi all, I would like to test the relevance of a vector field (i.e. if the vectors are organized or not). To do so, I would like to use an autocorrelation test, so that I have two questions: - is the Watson test applicable to that perpuse ? - is the kuiper test applicable to that purpuse ? Regards ------------------------------------------------ Emmanuel Poizot Cnam/Intechmer B.P. 324 50103

Dear all, I have a time serie dataset such as the following with data acquired every 15 minutes: Date Heure Profondeur Temp?rature Salinit? Turbidit? Chloration 1 2012-07-06 08:47:22 -0.144 22.469 0.011 0.000 0 2 2012-07-06 09:02:21 -0.147 22.476 0.011 0.000 0 3 2012-07-06 09:17:21 -0.139 22.498 0.011 19.323 0 4 2012-07-06

Dear all, I tried to install gstat package and add the following compilation error : ------------------------> * Installing *source* package 'gstat' ... creating cache ./config.cache checking for gcc... gcc checking whether the C compiler (gcc ) works... yes checking whether the C compiler (gcc ) is a cross-compiler... no checking whether we are using GNU C... yes checking whether

Hi, I would like to know if there is a way to change a vector of arbitrary size to make it fits the nearest upper size multiple of a power of 2. -- Cordialy ---------------------------------------- Emmanuel POIZOT Cnam/Intechmer Digue de Collignon 50110 Tourlaville T?l : (33)(0)2 33 88 73 42 Fax : (33)(0)2 33 88 73 39 -----------------------------------------

Hello, I install R under Mandrake Linux 8.2. R itself work fine, but I had an error to install packages, i.e. fields, geoR and geoRglm : $: R CMD INSTALL geoRglm_0.4-3.tar.gz Installing *source* package `geoRglm' ... libs gcc-3.0.1 -I/usr/lib/R/include -I/usr/local/include -mieee-fp -D__NO_MATH_INLINES -fPIC -O3 -fomit-frame-pointer -pipe -mcpu=pentiumpro -march=i586 -fno-fast-math

Hello, I install R under Mandrake Linux 8.2. R itself work fine, but I had an error to install packages, i.e. fields, geoR and geoRglm : $: R CMD INSTALL geoRglm_0.4-3.tar.gz Installing *source* package `geoRglm' ... libs gcc-3.0.1 -I/usr/lib/R/include -I/usr/local/include -mieee-fp -D__NO_MATH_INLINES -fPIC -O3 -fomit-frame-pointer -pipe -mcpu=pentiumpro -march=i586 -fno-fast-math

Hello, I want to print points having value on 3 variables in a triangle (ternary diagram). How can I di this with R ? -- Cordialement ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~ Emmanuel POIZOT ~ CNAM/INTECHMER ~ B.P. 324 ~ 50103 CHERBOURG CEDEX ~ T?l : (33) 233 887 342 ~ Fax : (33) 233 887 339 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Dear all, I facing pbs using RODBC library. I'm working on a Linux (Ubuntu Gutsy) os, with R version 2.5.1. I've got Postgresql 8.2.5 installed with the odbc-postgresql package. I try to connect in a R session to a postgresql database using: odbcConnect(dsn="thedatabasename",uid="theuser",pwf="thepasswd",case="postgresql") I get a message error,

Hi, I develop a little pice of code to perform a watson test. I try to compare the result obtain with my code and those given by the R library CircStats and it's watson(x,alpha,dist) provided function. My trouble is that I've got a set of test data (with it's watson test result) and the result given by R's watson function is not the same. Is there anybody who knows witch function

Dear all, I would like to use GeoXp package under Ubuntu Jaunty. I did install the required package GeoXp, for which I had to install before rgdal package. So when done, I want to load the library (library(GepXp), I got the error when GeoXP want to load rgdal package: > library(sp) > library(rgdal) Error in fun(...) : GDAL Error 1: libgrass_I.so: Ne peut ouvrir le fichier

Hi, I would like to eliminate the trend of a set localised (with x an y) data. I try to fit a linear model to the data: mod.01 <- lm(ff~x+y) I've got so a model. My question is how can I do to subtract the model from the initial f data ? -- Cordialement ---------------------------------------- Emmanuel POIZOT Cnam/Intechmer Digue de Collignon 50110 Tourlaville T?l : (33)(0)2 33 88 73 42

Dear all, I did post a message about problems on installing a package (gstat) which ends with a compilation error: ** libs gcc -I/usr/lib/R/include -mieee-with-inexact -fPIC -g -O2 -c block.c -o block.o gcc -I/usr/lib/R/include -mieee-with-inexact -fPIC -g -O2 -c chfactor.c -o chfactor.o gcc -I/usr/lib/R/include -mieee-with-inexact -fPIC -g -O2 -c copy.c -o copy.o gcc

Hello all, I have been a R user for about a year now, running on a MS Windows machine. I am in the process of making a complete switch to open-source. Linux is a new world to me. Ubuntu was my selection of the various distributions. Please pardon this very basic question (I was unable to locate an answer on R or Ubuntu). I used Synaptic to download the necessary files to run. However, I was

Dear all, I have two coordinates vectors, say X and Y of length n. I want to generate for each couple of coordinates X1,Y1 X2,Y2 X3,Y3....Xn,Yn a random coordinate which is located in a square define as X +/- dx and Y +/- dy. I saw the runif function which can generate for just one value at a time what I want : runif(1, X - dx, X + dx) for X and runif(1, Y - dy, Y + dy) for Y. I would like

Hello, I use wavethresh packages to perform wavelet analysis. In particular, I would like to compare 2 signals (vectors) after a wavelet decomposition. I would like to use cor.test function, but this function acts on the entire vector values. I plan to perform a cor.test on each level of the wavelet decomposition, say N. So I will have at the end of a first step N results of cor.test. How can

Hi, I use R 1.6.2 under Mandrake9.0. I've got a problem with the postscript files I try to creat. When I look to the file with ghostview it's ok. When I want to print it, I've got a blank page or a black page (fill of black encre) I changed the printer (guessing it was my driver printer), it was the same. Does anyone had the same problem and resolved it ? -- Cordialy