I recently was faced with the desire to port some tree models developed in R to SAS so I could score a large database. To me this makes sense as SAS is better with large files (or at least so as not to offend anyone, I am better with large ... [Read more...]

This is one of my favorite charts, it easily allows one to see how many predictions are right, and it allows one to see where the wrong ones are as well. It is the equivalent of a confusion matrix, but sometimes a picture is worth a thousand words. Some sample ... [Read more...]

This function generates nice looking tree diagrams (see sample) below from tree objects (generated by package tree). This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the ... [Read more...]