Monday I upgraded R on my work desptop, which is running Kubuntu 11.10, and upgraded all of my installed R packages, too. This resulted in the breakage of ggplot2 code that had previously worked.Here's the code, which draws a stacked bar chart: # plot...
Monthly Archives: April 2012
useR! 2012 Conference
“Spatial data is, quite literally, everwhere” (Barry Rowlingson) this is so true! And because of that you guys will have the chance to take part in a great tutroial on using R for managing geospatial data, transforming, making maps and working with OGC standards. So visit this years useR! conference at Vanderbilt University; Nashville, Tennessee,
20 free R tutorials (and one reference card)
If you're just getting started with the R language, R user Pairach Piboonrungroj has published a handly list of 20 free R tutorials published by university departments. Included on the list: Getting Started with the R Data Analysis Package (by Norm Matloff), Getting Started with R (from York University), and An Introduction to R (by Phil Spector). Paraich also...
Reproducible Research: Running odfWeave with 7-zip
odfWeave is an R-package that is used for making dynamic reports by Sweave processing of Open Document Format (ODF) files. For anyone new to report generation and lacking knowledge of markup languages this might be a good starting point or even a true ...
Short versus long papers, in academic journals
This Monday, during my talk on quantile regressions (at the Montreal R-meeting), we've seen how those nice graphs could be interpreted, with the evolution of the slope of the linear regression, as a function of the probability level. One illustrati...
Projects in RStudio
Now that I have one enormous project on the go and one smaller one, I find it’s helping me considerably to have each project stored in separate RStudio projects. So, each project has its own scripting that I’ve been working … Continue reading →
R, Julia and genome wide selection
— “You are a pussy” emailed my friend. — “Sensu cat?” I replied. — “No. Sensu chicken” blurbed my now ex-friend. What was this about? He read my post on R, Julia and the shiny new thing, which prompted him … Continue reading →
Insights into Quantile Regression from Arthur Charpentier
At this Monday’s Montreal R User Group meeting, Arthur Charpentier gave an interesting talk on the subject of quantile regression. One of the main messages I took away from the workshop was that quantile regression can be used to determine if extreme events are becoming more extreme. The example given was hurricane intensity since 1978. 
Varying Window Length for Linear Models on Stocks
In a previous post, we discussed ideas generated by a Timely Portfolio post about Linear Models on Stock. I wanted to see if there was a relationship between the window length of the running mean of the linear regression slope estimate and the running mean of the correlation between fitted and observed values. The parameters
How to remember point shape codes in R
I suspect I am not unique in not being able to remember how to control the point shapes in R. Part of this is a documentation problem: no package ever seems to write the shapes down. All packages just use the “usual set” that derives from S-Plus and was carried through base-graphics, to grid, lattice Related posts:
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
