similar to: HOW TO AVOID LOOPS

Displaying 20 results from an estimated 1000 matches similar to: "HOW TO AVOID LOOPS"

2005 Aug 29
5
Testing if all elements are equal in a vector/matrix
Is there a canonical way to check if all elements of a vector or matrix are the same? Solutions below work, but look hackish to me. > x <- rep(1, 10) > all(x == x[1]) # == operator does not provide for small differences [1] TRUE > isTRUE(all.equal(x, rep(x[1], length(x)))) # ugly [1] TRUE Best, Vincent -- Vincent Goulet, Associate Professor ??cole d'actuariat
2005 Apr 20
1
Negative argument for head() and tail()
Dear R developers, I'm a former APL programmer. In that language, the "take" (up arrow) and "drop" (down arrow) operators were extensively used to, well, take and drop elements of vectors. Functions head() and tail() are equivalents in R for the "take" operator, but nothing seems to mimic the "drop" operator. I think it would be useful. For
2006 Jan 31
2
Announce: Contributed Documentation
[Version fran??aise plus bas] To the R community, A quick word to announce the publication of my document "Introduction ?? la programmation en S". It is available in the French section of the Contributed Documentation page of CRAN. Many of the documents or books currently available on S-Plus and/or R present the software in a statistical analysis context. My document rather focuses
2005 Feb 23
3
and [ESS] Starting ESS
Dear R People: I have finally seen the error of my ways and have decided to use ESS for R and S + stuff. However, I have a question right from the beginning. I'm somewhat confused by the installation instructions. Do I install XEMACS or ESS first, please? Windows XP R Version 2.0.1 (S + 6.2) Thanks so much! Sincerely, Laura Holt mailto: lauraholt_983 at hotmail.com
2006 Sep 27
1
S3 methods for cbind/rbind
I created a type of object similar to a data frame. In some circumstances, It needs special methods for "[" and "[<-" and rbind() (but not cbind()). Then I found this in the cbind()/rbind() man page: The method dispatching is _not_ done via 'UseMethod()', but by C-internal dispatching. Therefore, there is no need for, e.g., 'rbind.default'.
2006 Sep 17
2
Building the call of an arbitrary function
Hy all, Is there a direct way to build the complete function call of an arbitrary function? Here's what I want to do. A function will build a function which will itself call a probability density function for some law given in argument to the first function: > f("gamma", 1000) will return, say, function(x, shape, rate, scale = 1/rate) dgamma(x + 1000, shape, rate,
2007 Dec 18
2
bug in r-base (PR#10521)
Full_Name: marco zamboni Version: no R version OS: ubuntu gusty Submission from: (NULL) (87.9.174.188) I have just finish to install gusty ubuntu on my AMD sempron. I would like to: $ sudo apt-get install r-base but ... I seguenti pacchetti hanno dipendenze non soddisfatte: r-base: Dipende: r-base-core (>= 2.6.1-1gutsy0) ma 2.5.1-1 sta per essere installato Dipende:
2007 Dec 18
2
bug in r-base (PR#10521)
Full_Name: marco zamboni Version: no R version OS: ubuntu gusty Submission from: (NULL) (87.9.174.188) I have just finish to install gusty ubuntu on my AMD sempron. I would like to: $ sudo apt-get install r-base but ... I seguenti pacchetti hanno dipendenze non soddisfatte: r-base: Dipende: r-base-core (>= 2.6.1-1gutsy0) ma 2.5.1-1 sta per essere installato Dipende:
2009 Jun 16
1
Testing if all elements are equal in a vector/matrix
Hi All, There are several replies to the question below, but I think there must exist a better way of doing so. I just want to check whether all the elements of a vector are same. My vector has one million elements and it is highly likely that there are distinct elements in the first few itself. For example: > x = c(1,2,rep(1,100000)) I want the answer as FALSE, which is clear from the
2006 Jul 05
2
Compilation of R packages
Le Mercredi 5 Juillet 2006 09:41, Dirk Eddelbuettel a ?crit?: > Salut Vincent, > > On 4 July 2006 at 23:27, Vincent Goulet wrote: > | I'm currently following your procedure suggested on R-SIG-Debian > | (https://stat.ethz.ch/pipermail/r-sig-debian/2006-June/000095.html) to > | compile and install the latest version of R on Kubuntu. It is my > | understanding that I
2007 Mar 13
2
An example of "overloading" [
Hello: Could anyone point me to a nice example where someone has created methods for "[" on a user defined Class? I looked at the package Matrix but that was a little daunting. I'm looking for someone a little more introductory. I've tried to search the help section and the web but its difficult since "[" isn't searchable. Thanks in advance! Greg [[alternative
2010 May 31
1
Suggested tidying up
Package grDevices has a function cm() to convert from inches to centimeters. Its definition is: cm <- function(x) 2.54*x As far as I can tell, the function is not used anywhere in the R sources (I grepped for "cm(", "cm)" and ", cm".) I did not check for all packages on CRAN, though. May I propose to remove this apparently useless function from the sources? [I
2005 Sep 07
1
Avoid Sweave from stopping on errors
Hi all, Is there an option in Sweave to avoid it from stopping on a code chunk with an error? (I purposefully want to include code with an error in class notes.) I suspect the answer is "no" and that I will be pointed to options("error"). That'd be fine, but which error parameter will just "do nothing" in case of an error? Thanks in advance! -- Vincent
2008 Feb 14
1
Small encoding question
Dear developeRs, Compilation of the latest version (0.9-5) of my actuar package fails with r-release MacOS_X ix86 on CRAN; see http://www.R-project.org/nosvn/R.check/r-release-macosx-ix86/actuar-00check.html All errors come from accented letters in comments in latin-1 encoded files (except hierarc.R which is in UTF-8, my bad). Encoding is declared as latin-1 in DESCRIPTION. The package
2009 May 05
2
Bristol mirror GPG problem ubuntu repository
Hello, I am getting a GPG error with the ubuntu repository at the bristol UK mirror. When my source.list has this line: deb http://www.stats.bris.ac.uk/R/bin/linux/ubuntu/ intrepid/ On an "apt-get update" you get this: W: GPG error: http://www.stats.bris.ac.uk intrepid/ Release: The following signatures were invalid: BADSIG D67FC6EAE2A11821 Vincent Goulet <vincent.goulet at
2005 Jul 20
2
Issues with convolve
We obtained some disturbing results from convolve() (inaccuracies and negative probabilities). We'll try to make the context clear in as few lines as possible... Our function panjer() (code below) basically computes recursively the probability mass function of a compound Poisson distribution. When the Poisson parameter lambda is very large, the starting value of the recursive scheme ---
2008 Mar 20
2
Installation of R, Sweave, ESS and [X]Emacs on Windows?
I'm trying to get R, Sweave, ESS and XEmacs or emacs all installed and working together on my Windows XP Pro system. I've got R 2.6.0 working just fine, installed from the R Windows installer. I also have CYGWIN_NT-5.1 with XEmacs 21.4 working okay. Can anyone point me to any documentation on how to bring these together so that R code typed in Xemacs can be run in R? I found the ESS
2008 May 02
2
Out of bounds negative index
Hi, From the R Language Definition, Section 3.4.1: "If i is positive and exceeds length(x) then the corresponding selection is NA. A negative out of bounds value for i causes an error." (This is also mentioned in S Programming, footnote of page 24.) Can someone please provide an example triggering the error? Looking in src/main/subscript.c I could not find exception handling for
2007 Jun 06
3
C function with unknown output length
Hi all, Could anyone point me to one or more examples in the R sources of a C function that is called without knowing in advance what will be the length (say) of the output vector? To make myself clearer, we have a C function that computes probabilities until their sum gets "close enough" to 1. Hence, the number of probabilities is not known in advance. I would like to have an
2006 Jul 17
1
Patch to allow negative argument in head() and tail()
Dear developeRs (and other abuseRs ;-), I would like to contribute a patch against functions head() and tail() of package utils to allow for a negative 'n' argument. This allows to extract all but the first/last 'n' elements/rows/lines of an object, similar to the "drop" operator of APL. [1] I put the patched head.R and head.Rd files, along with diff files in