I've been complaining about how homicide statistics from police sources were too low in 2009, with the entire state of Chihuahua having less homicides than its biggest city. I was thinking of finding out if I could use the IFAI (Freedom of Information Access) to obtain the original CIEISP forms which the state police forces are supposed to fill out each month...
I've been complaining about how homicide statistics from police sources were too low in 2009, with the entire state of Chihuahua having less homicides than its biggest city. I was thinking of finding out if I could use the IFAI (Freedom of Information Access) to obtain the original CIEISP forms which the state police forces are supposed to fill out each month...
Been meaning to write this for awhile...An R-Chart is a statistical quality assurance tool used to determine if a process is stable (and predictable). It is intended to maintain and improve the quality of a process (a more formal definition is av...
I have found myself over the years in a rather awkward situation. I work in old-school, bricks and mortar industry IT shops for the most part. However, I love many open source projects and identify with many of the values of start up cultur...
Basically every function you use in R is part of a package (often the base or stats one). Most of the advances routines, such as the differential equations solvers in simecol are brought to R in the form of Fortran (…)
R can produce some beautiful graphics, and there are some excellent packages, such as lattice and ggplot2 to represent data in original ways. But sometimes, all you want to do is explore the realtionship between pairs of variables with the minimum of fuss. In this post we’ll use the data which we imported in the 
As mentioned in a previous post, the US Department of Energy has been providing data about the Deepwater Horizon as it becomes available. Recently, the amount of oil and gas recovered was made available. The spreadsheet includes a grap...
In this post we will build on the last one, and create a matrix scatterplot. The package lattice allows for some really excellent graphics. In case you haven’t already seen it I recommend the R Graph Gallery for some examples of what it can do – browse the graphics by package used to create them. 
R O How G8 U R!Hey, R U there? Having used the R language for awhile now, I would like to let you know that R works - in fact R works really well. If you keep up with R news this should be no surprise...this is, after all...an r blog! R and R alone c...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
