The GGobi book is now available from Springer and Amazon, after quite a delay. Getting the figures printed correctly was difficult. Solutions to the exercises in the back of each chapter are available for instructors by emailing Springer.The movies on ...
Monthly Archives: January 2008
New material on the GGobi book web page
The GGobi book is now available from Springer and Amazon, after quite a delay. Getting the figures printed correctly was difficult. Solutions to the exercises in the back of each chapter are available for instructors by emailing Springer.The movies on ...
The hammer, or the sledgehammer? A small study in simulation
RKN over at Epidemiology blog had a small problem he solved using simulation:I have been interested in the following question: if there are, let's say, 5 genes involved in the liability of fx risk, and each gene has two alleles with one of them conferr...
Shading overlapping area of curves in R
I was trying to plot figure in R like the one below, which is basically the veto player model of Tsebelis. Based on my knowledge of R now, I encountered 2 major problems:I don't know if there is a function that can draw archs, or at least partial curves from circles.I don't know if there is a good way...
Heuristics for statistics
SIMPLE WAYS TO DETECT AND COMMUNICATE STATISTICAL EFFECTS Decision Science News is fond of heuristics and the Simonian view that for many problems organisms face, optimization is a fiction and satisficing makes us smart. Statistics is an area in which it is easy to see precision that isn’t there and find “optima” in problems that
Hack-at-it 2007
The GGobi Hack-at-it 2007 was held just before useR! 2007 in Ames Iowa.The main focus this year was on the data pipeline again, and on pipelines in other software.Several projects were discussed: the geometric shapes, high-dimensional games, local neig...
Hack-at-it 2007
The GGobi Hack-at-it 2007 was held just before useR! 2007 in Ames Iowa.The main focus this year was on the data pipeline again, and on pipelines in other software.Several projects were discussed: the geometric shapes, high-dimensional games, local neig...
ERGMs in R
Developers of statnet, a collection of packages for R for fitting Exponential Random Graph Models (ERGM), issued a major update. First change is that the main package is now called ergm. Secondly, a set of additional packages has been made available. Apart from package network, that provides a class system for relational data on which 
Resources for S4 classes and methods
Learning the programming in the new S4 system of classes and methods in R can be quite cumbersome, even though the methods package is very well documented. That is why I collected some of the info and materials that I am aware of on a separate page here. I warmly welcome any suggestions for extending 
GillespieSSA 0.5-1 is released
I just uploaded GillespieSSA 0.5-1 to CRAN. Now it’s just a matter of days before it has propagated itself across all CRAN mirrors. This version consists primarily of revisions I made in response to the reviewer comments on the paper … Continue reading →
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
