http://romainfrancois.blog.free.fr/index.php?

In case you missed them, here are some articles from last month of particular interest to R users. This post demonstrated reader Paul Bleicher's code for visualizing a time series as a heat-map calendar. This post and followup showed (with thanks to Drew Conway) how to use R to perform social network analysis on live data from Twitter. This...

swfDevice is an R package I am developing that produces swf (flash) files natively from R. If anyone can step up and help get a working windows build up and running that would be great! I have little expertise with windows and I am just about stuck as what to do next. The task involved

These instructions were originally from instructions from my friend Charlie. I really like to use Github but R-Forge has alot of nice features for package development, so why not get the best of both worlds. Say you have a git repo (with an R package or something else) but want to create a local brach

Hadley Wickham recently shared a nice tip on how to get a faceted scatterplot plot with all points in the background of each plot. This technique makes a clever use of setting the faceting variable to NULL so that all points are plotted in light grey in all the facets. > library(ggplot2) > ggplot(mtcars, aes(cyl,

I've been invited me to create my account on ohloh

LaTeX is a typesetting language that is known for its beautiful mathematical formulas. It is similar to HTML in that you write your document in plain text and process (or compile) it to create a postscript or PDF file. You will need to download a LaTeX processor for your platform. On Windows, TeXnicCenter (http://www.texniccenter.org/) is

In designs where there are multiple factors, all with a discrete group of level settings, the full enumeration of all combinations of factor levels is referred to as a full factorial design. As the number of factors increases, potentially along with the settings for the factors, the total number of experimental units increases rapidly. In many

A Beautiful WWW put together a great set of resources for getting started with machine learning in R. First, they recommend the previously mentioned free book, The Elements of Statistical Learning. Then there's a link to a list of dozens of machine learning and statistical learning packages for R. Next, you'll need data. Hundreds of free real datasets are...

This is an updated version of yesterday's post with corrected URLs -- by copy-and-pasting I had still referenced the previous slides from UseR! 2009 in Rennes instead of last Friday's slides from the ISM presentation in Tokyo. The presentations page h...

This is an updated version of yesterday's post with corrected URLs -- by copy-and-pasting I had still referenced the previous slides from UseR! 2009 in Rennes instead of last Friday's slides from the ISM presentation in Tokyo. The presentations page ha...

This is an updated version of yesterday's post with corrected URLs -- by copy-and-pasting I had still referenced the previous slides from UseR! 2009 in Rennes instead of last Friday's slides from the ISM presentation in Tokyo. The presentations page had the correct URLs, and this has been corrected below for this re-post. My apologies! As mentioned yesterday, I spent a few days last week...

Here is an OpenSSH software I personally found useful and working well under Windows 7 / Vista. It is copSSH. Besides it is free and open source, it is still actively maintained. It works well with the UAC (user account control setting) of Windows...

Here is an OpenSSH software I personally found useful and working well under Windows 7 / Vista. It is copSSH. Besides it is free and open source, it is still actively maintained. It works well with the UAC (user account control setting) of Windows...

I’m looking at ways to provide access to R via a web application. First rule: see what’s available first, before you reinvent the wheel. It’s not pretty. From the R Web Interfaces FAQ: Software Brief notes Rweb Page last updated 1999. Of the 3 example links on the page one ran very slowly, the second not at

Just got back from Tokyo a few hours ago: I had an opportunity to give my 'Introduction to High-Performance Computing with R' tutorial / lectures (for which previous slides can be found here). This was an all-day talk at the Institute for Statistical Mathematics at their new site in Tachikawa in the greater Tokyo area, thanks to an invitation by...

…in R of course! There is a handy function to do those calculations. Normally (ahh!) you might resolve to a symbolic calculation package (Maple,Mathematica etc.) but that is not the situation any more. The calculations are done with the mnormt package. Relevant functions exist in other packages as well (R : Distributions) x <- seq(-2,4,length=21) y <- 2*x+10 z

One of the search terms that bring people frequently to my site is “install ESS on Mac OS X” or something like that. As it turns out installing ESS on OS X is really easy, but Google search does not really bring up good instructions. There are at least two easy options: Use Aquamacs, it

This post, as with the prior ones on trade clusters, aims to help visualize patterns of trade in the OECD from 50 years of partner trade statistics. The data is rich, meaning we should be able to develop rich intuition by exploring it visually. These slides follow the method laid out in Jong-Eun Lee, “Two

One of the search terms that bring people frequently to my site is "install ESS on Mac OS X" or something like that. As it turns out installing ESS on OS X is really easy, but Google search does not really bring up good instructions. There are at least two easy options: Use Aquamacs, it comes bundled with...

One of the search terms that bring people frequently to my site is "install ESS on Mac OS X" or something like that. As it turns out installing ESS on OS X is really easy, but Google search does not really bring up good instructions. There are at least two easy options: Use Aquamacs, it comes bundled with...