similar to: Struggling with S3/S4 interface issues and External Pointers

Hello folks, I'm embarking on a project to embed R into the Apache web server, and I'd like your help. Currently, I'm looking for a way for R code to call back into a shared library from which the R shared library was loaded. Essentially, apache starts and loads mod_R.so which runs an initialization routine which calls Rf_initEmbeddedR() and the following code: /* override to

What is it? ----------- mod_R is a project dedicated to embedding the R interpreter inside the Apache 2.0 (and beyond) web server for the purpose of writing web applications in R. It's composed of three parts: mod_R: the Apache 2.0 module that implements the glue to load the R interpreter. RApache: the R package that provides the API for programming web applications

What is it? ----------- mod_R is a project dedicated to embedding the R interpreter inside the Apache 2.0 (and beyond) web server for the purpose of writing web applications in R. It's composed of three parts: mod_R: the Apache 2.0 module that implements the glue to load the R interpreter. RApache: the R package that provides the API for programming web applications

I installed mod_r according to the specifications, and have been trying to get the demo script to work correctly. I am running debian, the latest build of R, apache 2 with prefork mpm, and the latest mod_r. Is anyone else using this module successfully? I added: LoadModule R_module mod_R.so <Location /test/hello> SetHandler r-handler Rsource /var/www/html/test.R RreqHandler

Hello, The use of .Call and the like all depend on loading shared libraries and registering routines from it. Also, .Primitive and .Internal depend on routines being registered in the R binary. And applications that embed R can override routines declared in Rinterfac.h, but is there a way for an application embedding R to register other routines defined in the application without loading a

Hi, Can somebody advice on weird mysqlWriteTable bug. > mysqlWriteTable(conn, 'comparison',design2, row.names = F, overwrite=T) Error in mysqlExecStatement(conn, statement, ...) : RS-DBI driver: (could not run statement: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '"condition"

Hi, Is this sufficient? if (.Machine$sizeof.pointer==4){ cat('32\n') } else { cat('64\n') } Or is it better to test something in R.version, say os? I'd like to use this to specify appropriate linker arguments when building the RMySQL windows package. Jeff -- http://biostat.mc.vanderbilt.edu/JeffreyHorner

From: xxgreat@hotmail.com To: r-help-bounces@r-project.org Subject: compare a vector and a row of a matrix Date: Sun, 26 Sep 2010 23:23:52 +0800 Hi Everyone: I am trying to compare a vector and rows of a matrix for example > xn <- c(1,2,4,4,5,5,5,6) >yn <- c(1,2,5,7,1,2,3,1) >mtrx <- cbind(xn, yn) when I tried, say, > c (1,4), the result was TRUE, TRUE.

I installed the RMySql package in R 2.11.1 64 bit Now how can I connect R with MySql? I am using a windows 7 64 bit version. Please help ASAP. -- Thanks & Regards Arijeet Mukherjee +91-8981598879 [[alternative HTML version deleted]]

I am trying to install RMySQL on OpenSolaris and need to pass some options to configure. Tried the 3 recommended ways of doing it and nothing works, configure cannot find the headers and the libs. I ran configure manually and that worked fine ./configure CC=cc CFLAGS="-dalign -KPIC -xlic_lib=sunperf" LDFLAGS="-L/usr/sfw/lib

Is this possible? For instance, I have a function that returns a vector length 3. In one statement I'd like to assign each element of the vector to different variables. Syntactically, I hoped this would work: c(x,y,z) <- myfun(); Thanks, -- Jeffrey Horner Computer Systems Analyst School of Medicine 615-322-8606 Department of Biostatistics Vanderbilt University

Hi, I've been tracking down a memory leak in an rApache application, http://data.vanderbilt.edu/rapache/bbplot. The code was deployed in 2007 and has survived numerous upgrades of both R and rApache (including upgrades and bugs in RMySQL). It's written in such a way so that web crawlers will download every possible URL the app will create. It's not a high-traffic app, but just about

( A similar problem is also reported by Sebastian P. Luque with library(maptools) library(trip) in the vignette as below ). I am writing a vignette which loads RMySQL and RPostgreSQL. This produces the warning: Loading required package: DBI Warning in .simpleDuplicateClass(def, prev) : A specification for class ?dbObjectId? in package ?RPostgreSQL? seems equivalent to one from package

Is this possible? I've tried both writeChar() and writeBin() to no avail. My goal is to serialize(ascii=FALSE) an object to a connection but determine the size of the serialized object before hand: sobject <- serialize(object,NULL,ascii=FALSE) len <- nchar(sobject) # # run some code here to notify listener on other end of connection # how many bytes I'm getting ready to send #

(I am not sure if this is a bug or a request for a more understandable warning, or possible something obvious I should be posting on r-help.) I am trying to coerce an new class object to be a DBIConnection and it does not work the way I think it should: R version 2.5.1 (2007-06-27) ... > require("RMySQL") # or require("RSQLite") Loading required package: RMySQL Loading

R-devel, I'm interested in looking at some examples of existing R packages that rely heavily on S4 classes to get a feel for varying styles and package organization techniques. Could you recommend any packages that might serve as a good starting point? Thanks in advance, Jeff

R-devel, I'm interested in looking at some examples of existing R packages that rely heavily on S4 classes to get a feel for varying styles and package organization techniques. Could you recommend any packages that might serve as a good starting point? Thanks in advance, Jeff

Hello all, I'd like to utilize the R_Sock* functions from R_ext/R-ftp-http.h in my R package. The intent is to use these in conjunction with R_serialize() to store R objects in a remote data store. I'm aware that version 2.2.1 of "Writing R extensions" explains that these may be undocumented and unstable, but I have a couple of questions: 1) are they platform independent?

Should functions or the user be responsible for coercing an S4 object argument containing the proper object (and thus should below be considered a bug in the packages or not)? The example is with RSQLite but the same thing happens with RMySQL, and other DBI packages. > library("RSQLite") Loading required package: DBI > m <- dbDriver("SQLite") > con <-

dear r-community, currently i have a workflow as following: data in online-MYSQL-database via .csv into R for analysis, results back to mysql. generating graphics for reports also. that's ok, but i need some process-optimization. i'd like to run r directly on the webserver. analysis should work automatically, after the appropriate r-script was selected in a browser-gui for R. until