IT is now appropriate to lay out our two regression models in full for empirical estimation over our two separate time periods. The first estimation is from 4/1/71 to 7/1/97 and the second is from 4/1/01 to 4/1/11. The methodology employed in the estimation of these two models is a procedure using Generalized Least Squares with a Cochrane-Orcutt, style iterated...
Things have been a little quiet, post wise here, of late, in part because of the holiday season… but I have been posting notes on a couple of charts in progress over on the F1DataJunkie blog. Here are links to the posts in chronological order – they capture the evolution of the chart design(s) to 
A minor new release of the RcppExamples package is now on CRAN. RcppExamples contains a few illustrations of how to use Rcpp. It grew out of documentation for the classic API (now in its own package RcppClassic), and while we added a few more funct...
A famous finance professor once told us that good diversification meant holding everything in the world. Fine, but in what proportion? Suppose you could invest in every country in the world. How much would you invest in each? In a market-capitalization weighted index, you'd invest in each country in proportion to the market value of its investments (its "market capitalization")....
This is a quick post on the importance of benchmarking time-series forecasts. First we need to reload the functions from my last few posts on times-series cross-validation. (I copied the relevant code at the bottom of this post so you don't...
The R package dcemriS4 provides routines for the quantitative analysis of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI), along with quantification of diffusion-weighted MRI (ADC = apparent diffusion coefficient) and quantitative T2 map...
So the Weecology folks have published a large dataset on mammal communities in a data paper in Ecology. I know nothing about mammal communities, but that doesn't mean one can't play with the data...Their dataset consists of five csv files: &...
So the Weecology folks have published a large dataset on mammal communities in a data paper in Ecology. I know nothing about mammal communities, but that doesn't mean one can't play with the data... Their dataset consists of five csv fil...
So the Weecology folks have published a large dataset on mammal communities in a data paper in Ecology. I know nothing about mammal communities, but that doesn't mean one can't play with the data... Their dataset consists of five csv fil...
Volume 44 of the Journal of Statistical Software was published in October 2011. The special volume on “Magnetic Resonance Imaging in R” features articles and packages related to a variety of imaging modalities:
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
