Articles by Karsten W.

head and tail for strings

October 2, 2010 | Karsten W.

The functions head and tail are very useful for working with lists, tables, data frames and even functions.But they do not work on strings. It is easy to define such functions__ strtail + if(n+ substring(s,1-n) + else + substring(s,nchar(s)-n+1)+ }__ strhead + if(n+ substr(s,1,nchar(... [Read more...]

Tuning Notepad++

August 12, 2010 | Karsten W.

Here are some tricks I collected for making Notepad++ a more comfortable text editor for me in general in for the R programming language in particular.Switch between tabs in Notepad++ with Ctrl-PageUp/DownNotepad++'s default behaviour is to use Ctrl+(S... [Read more...]

use R! 2010 conference — reflections

August 4, 2010 | Karsten W.

From July 20-23, this year's use R! conference took place in Gaithersburg near Washington. I attended the conference as part of my holidays in the U.S. and had a good time there. I met some people, even though that is not the easiest thing for me to do, and ... [Read more...]

Rosetta language popularity

March 13, 2010 | Karsten W.

Rosetta Code is a community wiki which presents how to solve various programming tasks by different programming languages. Thus, it serves as a dictionary between programming languages, but also as cookbook of programming recipes for a specific language.One unsolved (until today) programming task for R was to rank languages ... [Read more...]

inkblot: an alternative to stacked bar graphs

February 25, 2010 | Karsten W.

Sometimes it is not easy to get useful information from a stacked bar chart, see for instance this blogpost at Support Analytics.So-called inkblot charts, as discussed at Kaiser Fung's Junk Charts, allow the reader to focus on the evolution of a time series.Now how to make this kind ... [Read more...]
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