Archive for the ‘R / R-Code’ Category

After some time of using shiny I got to the point where I needed to send some arbitrary data from the client to the server, process it with R and return some other data to the client. As a client/server programming newbie this was a challenge for me as I did not want to dive […]


I recently wanted to construe a dashboard widget that contains some text and other elements using the grid graphics system. The size available for the widget will vary. When the sizes for the elements of the grobs in the widget are specified as Normalised Parent Coordinates the size adjustments happen automatically. Text does not automatically adjust though. The […]


In this post we collect several R one- or few-liners that we consider useful. As our minds tend to forget these little fragments we jot them down here so we will find them again.


Guest post by Daniel Adler. Below is a real-time audio-visual multimedia demonstration – or in short ‘an intro’ – written in 100% pure R. It requires no compilation and runs across major platforms via the package rdyncall and preinstalled precompiled standard libraries such as OpenGL and SDL libraries. This ‘happy-birthday’ production runs about 3 minutes […]


The first week of April I attended an excellent workshop on biplots held by Michael Greenacre and Oleg Nenadić at the Gesis Institute in Cologne, Germany. Throughout his presentations, Michael used animations to visualize the concepts he was explaining. He also included  animations in some of his papers. This inspired me to do this post […]


Yesterday I surfed the web looking for 3D wireframe examples to explain linear models in class. I stumbled across this site where animated 3D wireframe plots are outputted by SAS.  Below I did something similar in R. This post shows the few steps of how to create an animated .gif file using R and ImageMagick. […]


Abilities of R for creating graphics is great, but one thing I always missed is the possibility of creating interactive plots and being able to look at graphs while changing one ore more parameters. I know that there is rggobi, but so far I always ran into problems with flexibility each time I wanted to […]


At the institute I’m working quite a lot of people prefer using Matlab and only a few of them know about R. Today one of my colleagues — who is also an eager user of Matlab — ran into the following problem: He had a vector in hand which consisted of elements. He wanted to […]


In a previous post I gave some examples of how to make a progress bar in R. In the examples the bars were created within loops. Very often though I have situations where I would like have a progress bar when using apply(). The plyr package provides several apply-like functions also including progress bars, so […]


Lately, David Smith from REvolution Computing set out to challenge the R community with the reprocuction of a beautiful choropleth map (= multiple regions map/thematic map) on US unemployment rates he had seen on the Flowing Data blog. Here you can find the impressing results. Being a fan of beautiful visualizations I tried to produce […]



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