Logistic Regression and Bias Reduction

May 22nd, 2012

David Firth published a paper in 1993 on maximum likelihood estimation and the reduction of bias when using this approach. The research in this area appears to provide benefit for logistic regression in small data sets where there is complete of quasi separation. This approach has been implemented for Generalized Linear Models in the brglm package. Read the rest of this entry »

Theme Elements in ggplot2

May 3rd, 2012

This website provides a simple summary of the theme elements that can be set within ggplot2. There should be sufficient information here to change the default settings for graphs within the ggplot2 package.