similar to: isFALSE

Hello, Is it possible to have the effect of UserDefinedDatabase outside of "attached" environments ? Can I disguise an environment of the sys.frames() as a UserDefinedDatabase ? This seems to suggest that it might be possible : > f <- function(){ e <- environment(); class(e) <- "UserDefinedDatabase"; ff } > f() *** caught segfault *** address (nil),

Hello, I'm trying to use the limited connections api defined in Rinternals.h. I have code that looks like this (inspired from do_serializeToConn) : SEXP serialize_to_connection( SEXP xp, SEXP connection ){ Rconnection con ; struct R_outpstream_st out; R_pstream_format_t type = R_pstream_binary_format ; SEXP (*hook)(SEXP, SEXP) = NULL ; con = getConnection(Rf_asInteger(connection));

Hello, Today, Brian Ripley commited the revision 50000 of R's svn repository. I took this as an opportunity to do some data analysis of the log and posted some code and graphics on my blog: http://romainfrancois.blog.free.fr/index.php?post/2009/10/09/celebrating-R-commit-50000 The plots of the number of commits per day (and per month) indicates a peak in 2002. Here are the top 20

>>>>> Henrik Bengtsson <henrik.bengtsson at gmail.com> >>>>> on Tue, 13 Mar 2018 10:12:55 -0700 writes: > FYI, in R devel (to become 3.5.0), there's isFALSE() which will cut > some corners compared to identical(): > > microbenchmark::microbenchmark(identical(FALSE, FALSE), isFALSE(FALSE)) > Unit: nanoseconds > expr

Hello, Consider this : > setClass("track", representation(x="numeric", y="numeric")) [1] "track" > o <- new( "track", x = 1, y = 2 ) > for( i in o ){ + cat( "hello\n") + } Error: invalid type/length (S4/1) in vector allocation This happens at those lines of do_for: n = LENGTH(val); PROTECT_WITH_INDEX(v =

FYI, in R devel (to become 3.5.0), there's isFALSE() which will cut some corners compared to identical(): > microbenchmark::microbenchmark(identical(FALSE, FALSE), isFALSE(FALSE)) Unit: nanoseconds expr min lq mean median uq max neval identical(FALSE, FALSE) 984 1138 1694.13 1218.0 1337.5 13584 100 isFALSE(FALSE) 713 761 1133.53 809.5 871.5

Hello, When using recover, the called from information is always "eval(expr, envir, enclos)", which is not particularly useful. > f <- function( ){ g <- function(){ stop( "ouch") }; g() } > options( error = recover ) > f() Error in g() : ouch Enter a frame number, or 0 to exit 1: f() 2: g() Selection: 1 Called from: eval(expr, envir, enclos) I'm

Hello, promptMethods generate a macro for signatures, but the macro does not exist in the Rd parser. > setClass("track", + representation(x="numeric", y="numeric")) [1] "track" > setGeneric("foo", function(x){ standardGeneric("foo") } ) [1] "foo" > setMethod( "foo", "track",

Dear R Developers, I would like to propose a simple optimization for print.data.frame base function: To add: x <- as.data.frame(head(x, n = options("max.print"))) This would prevent that, if for example, we have a 10GB data.frame (e.g.: Instead of a data.table), and we accidentally print it, the R Session does not "collapse", forcing us to press ESC or kill the RSession.

Full_Name: Mike Danilov Version: 2.9.0 OS: Fedora Core 9 Submission from: (NULL) (142.103.121.198) When checking for the symmetry of a matrix, function isSymmetric.matrix() gets confused by the discrepancy of colnames/rownames if its argument. See the code snippet below. Perhaps it's a problem of the matrix product which copies colnames of the first argument but not the rownames of the

I am hoping someone will tak up this chalenge (I am new to R) I have inheritied an R script but need to change it. The script currently includes hardcoded file locations on lines 12,166 and 167. I need to modify this script to allow the folder to be passed as a command line argument to Rscript.exe Can anybody help please? Regards, Ian http://www.nabble.com/file/p25924237/My_script.R

Dear All I want to call the R program from one Java program because In my project R program parameters are set by one web page developed by java. Is this possible to call R program from java? many thanks in advance -- Wesley C Mathew [[alternative HTML version deleted]]

Well here is one more brain-teaser related to assigning stuff into a list of list. What if I need to create a new list of empty lists? I have actually got a solution to this problem: l = list(list()) for ( i in sequence(length-1) ) { l = list(unlist(l,recursive=FALSE), list()) } But it is not very neat to do this in a loop. Are there any cuter ways to do this?

I need to create a function to find all the prime numbers in an array. Can anyone point me in the right direction? Thank you. AJ -- View this message in context: http://www.nabble.com/Function-to-find-prime-numbers-tp25868633p25868633.html Sent from the R help mailing list archive at Nabble.com.

A very common use case for regmatches is to extract regex matches into a new column in a data.frame (or data.table, etc.) or otherwise use the extracted strings alongside the input. However, the default behavior is to drop empty matches, which results in mismatches in column length if reassignment is done without subsetting. For consistency with other R functions and compatibility with this use

A private reply by Martin made me realize that I was wrong about stopifnot(exprs=TRUE) . It actually works fine. I apologize. What I tried and was failed was stopifnot(exprs=T) . Error in exprs[[1]] : object of type 'symbol' is not subsettable The shortcut assert <- function(exprs) stopifnot(exprs = exprs) mentioned in "Warning" section of the documentation similarly fails

I am looking to do some text analysis using R and have run into some issues with some of the packages. Im not sure if its my goofy Vista OS or what but using R 2.8.1 i s relatively successful loading the text but the rJava package was messed up somehow: library(tm) > library(rJava) Error in if (!nchar(javahome)) stop("JAVA_HOME is not set and could not be determined from the

... and also all objects that actually live in the .GenericArgsEnv environment. > all( sapply( ls( .GenericArgsEnv ), function(.) is.null(environment(.)) ) ) [1] TRUE This has the consequence preventing argsAnywhere to get the args of seq.int. > argsAnywhere( seq.int ) Error in exists(".packageName", envir = envir, inherits = FALSE) : use of NULL environment is defunct

library(some_library_name) Suppose I load a library. I'm wondering what command I should use to list all the functions, classes and variables defined in the library.

Hi All, I am trying to install the package rjags into a local library on a machine for which I do not have root permissions. Using the command: R CMD INSTALL --configure-args="--with-jags-include= ${JAGSBIN}/include/JAGS --with-jags-lib=${JAGSBIN}/lib/ --with-jags- modules=${JAGSBIN}/lib/JAGS/modules" CMD INSTALL -l ${JAGSBIN}/lib/ ../ rjags_1.0.3-12.tar.gz Where ${JAGSBIN} is