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6 results for “from:Ulf Martin”

comand line options with editor call
Ulf Martin · Aug 11, 2002 · r-help

Hi R users! Is there a way to call the editor with command line options? I.e. I want to use Vim and set it automatically in R mode when it is started. This requires something like vim -c "set...

package lattice
Ulf Martin · Jun 12, 2002 · r-help

moin > I am using R1.5.0. When using functions form lattice the background is > dark grey. I have tried to change it using par() but it does not work. By > the way, if I use par and the standard...

surprising behaviour of "bgroup": sets all in greek letters
Ulf Martin · May 20, 2003 · r-help

Dear R user community I wanted to use "bgroup" for plotting a math formula with a big "{" on the left, and nothing on the right. i used text( 10, 10, pos=4, cex=1.8, expression(F(x) == bgroup("{", x...

how to properly extend s3 data.frames with s4 classes?
Ulf Martin · Jan 24, 2007 · r-devel

Dear R Programmers! After some time of using R I decided to work through John Chambers book "Programming with Data" to learn what these S4 classes are all about and how they work in R. (I regret not having picked...

extracting rows from a data frame by looping over the row names: performance issues
Ulf Martin · Mar 2, 2007 · r-devel

Here is an even faster one; the general point is to create a properly vectorized custom function/expression: mymean <- function(x, y, z) (x+y+z)/3 a = data.frame(matrix(1:3e4, ncol=3)) attach(a) print(system.time...

Compiling 2.5.1 on OSX Panther (James Kyle)
Ulf Martin · Aug 10, 2007 · r-sig-mac

Hi James R. Milks schrieb: > You can find the compiled version of R 2.5.1 for OS 10.4.4 or higher > at http://cran.r-project.org/bin/macosx/. I try not to get into > compiling myself as...

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