similar to: accesing slots of S4 class in C code

Hi everyone! I am planning to use R and Rcmdr in a basic stat course. I have no access to a computer lab, but I can expect all students to have a laptop. Of couse, I have no control over their OS and in my experience several of them will have Macs. I have Windows. My question is the following: can I expect them to be able to install R, Tcl/Tk and Rcmdr (i.e. does anybody has experinece with it?)

I have created a DLL not so long ago using C code. My code used the IntegerFromString() function that used to be exported in the Rinternals.h header file (and thus easily accessible). Recently I upgraded to R 2.5.0 and my DLL stopped working. I see that the IntegerFromString() function is not exported in any of the header files in the RHOME\include directory. Is it possible for me to use it

I am a Windows user and trying to make life easier for my Mac-using students. After investigating the Mac situation more, it appears that the key to easy use is having precompiled binaries. However the packages I am interested in (Rcmdr and its required package, car) do not have one. I do not have easy access to a Mac, so I have a plea to Macintosh users: could someone please create them if it is

Hi, the following example aiming at a class containing a logical slot segfaults under R-1.9.0 when `gctorture(on = TRUE)' is used: Code code (dummy.c): #include <Rdefines.h> SEXP foo() { SEXP ans; PROTECT(ans = NEW_OBJECT(MAKE_CLASS("test"))); SET_SLOT(ans, install("lgl"), allocVector(LGLSXP, 1)); LOGICAL(GET_SLOT(ans,

Hi, I get an error indicating a missing library from the package 'Ruuid'. I suppose this means I should install RGtk. I just thought I'd document the error. Maybe a dependency entry is missing? R 2.9.0 OS X 10.5.8 Thanks, - chris > biocLite('Ruuid') Using R version 2.9.0, biocinstall version 2.4.12. Installing Bioconductor version 2.4 packages: [1] "Ruuid"

Dear All, When installing the Ruuid package (from Bioconductor) from sources on my MAC (OS X 10.3.5, R version 2.0.0) I get the following errors: m00245:~ ivisser$ R CMD INSTALL -l /Users/ivisser/Library/R/library/ /Users/ivisser/Desktop/Ruuid * Installing *source* package 'Ruuid' ... loading cache ./config.cache checking for glib-config... no checking how to run the C preprocessor...

Full_Name: Robert Denham Version: R-2.4.1 OS: Windows Xp Submission from: (NULL) (61.88.57.1) R gui exits without warning when I run a function which has an argument with a default that is not found. This was a result of an error in a function I wrote, but I thought that it should exit more gracefully than it does. Here is an example: testfun <- function(aa=aa) { aa <-

Hi (Duncan?), The other day I noticed some characters will cause errors in R CMD CHECK because of parse_Rd(), and AFAIK, these chars include '%', '{' and '}'. For example, note the comments in the example section: %~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~% \name{testfun} \Rdversion{1.1} \alias{testfun} \title{ A Test } \description{ A test } \usage{ testfun() } \value{ NULL }

Dear R users, I am running R-2.15.1 in Linux Slackware64-14.0. Here is my minimal working example: testfun <- function (x) { a <- 0; sapply(X="a", FUN=get, envir=sys.frame(which=x)); } Inside R, that is R called from within a Linux terminal, the following code works: testfun(x=5) print(testfun(x=6)) But within rkward the above code fails and the following works: testfun(x=1)

All, I am not understanding the scoping used in foreach when it is used inside a function. I keep getting "could not find function" errors for functions that are in memory when I try to use foreach within a function call. I have a simple example below. "testFun" is in memory and works when called by foreach directly, but when I place foreach in a function called

Hi, I posted this question to the regular help list, but it seems to be this is probably a question that is better addressed on r-devel. Sorry for the double posting. I am using hash-values to cache certain results in R. This caching also depends on the hash-value of the function that is being cached (calculated using the digest package). I noticed that computations that should already be cached

Dear All, I have three classes of questions about generating random numbers with different packages (windows xp 32bit R). . 1. Suppose I would like to use package *foreach*, can I use current Sys.time as a seed? Although I can get the time up to1e-6 second precesion, the code below dose not work well on a local machine with two cores. ################# library(foreach) library(snow)

Hi Luke, Ah - I see - thank you! This at least points me to a way on how to "fix" this. I tried setting the srcref attribute to NULL, but the hash value is still different and so is the serialization. So this looks like it is one difference, but not all of them Even if all differences were identified - it still leaves me with different behavior between interactive and batch-mode,

Dear all, Why does not the three-dot accept arguments from the parent environment? I am just confused with this error, can someone give me a hint? > rm(list=ls()) > testFun <- function(a, ...) + { + if(a){ + print(a) + }else + { + print(b) + } + } > > myTask <- function(a) + { + b <- 3 + testFun(a, b = b) + } >

> source("http://www.bioconductor.org/biocLite.R") > biocLite(c("Ruuid")) Running getBioC version 0.1.6 with R version 2.3.1 Running biocinstall version 1.8.4 with R version 2.3.1 Your version of R requires version 1.8 of Bioconductor. trying URL 'http://bioconductor.org/packages/1.8/bioc/src/contrib/Ruuid_1.10.0.tar.gz' Content type 'application/x-gzip'

I am confused by the behavior of the below piece of code. The NAs are making it past the logical call ==0. I am sure that I am missing something. I just don't understand this behavior. Thanks for your help in advance. ########code####################################################### left <- (structure(list(measurment_num = c(2, 2.2, 2.4, 2.6, 2.8, 2.82, 3, NA, NA, NA),

R-Help community, I understand that data.frames can hold elements of type double, string etc but NOT objects (such as a matrix etc). This is not convenient for me in the following situation. I have a function that takes 2 inputs and returns a vector: testfun <- function (x,y) seq(x,y,1) I have a data.frame defined as follows: testframe<-data.frame(xvalues=c(2,3),yvalues=c(4,5)) I would

Greetings, I am attempting to run a function, which produces a vector and requires two input variables, across two nested factor levels. I can do this using by(X, list(factor1, factor2), function), however I haven't found a simple way to extract the list output into an organized vector form. I can do this using nested loops but it isn't exactly an optimal approach. Thank you

Hi I'm trying to implement something similar to the following R snippet using C. I seem to have hit the wall on accessing class slots using C. library(fPortfolio) lppData <- 100 * LPP2005.RET[, 1:6] ewSpec <- portfolioSpec() nAssets <- ncol(lppData) setWeights(ewSpec) <- rep(1/nAssets, times = nAssets) ewPortfolio <- feasiblePortfolio( data = lppData, spec = ewSpec,

Apologees the novice question. Currently climbing up the learning curve of R. Suppose I have the following function and the data.frame: testfun<-function(x=1,y=2) x+y testframe=data.frame(col1=c(1,2),col2=c(3,4)) When evaluating testfun, I want to use the default value for y (which is 2) and for x, I want to feed (one by one) the values in col2 of testframe. How can I achieve this please?