[R] Failed installWithVers from local tar.gz

Hi, I am having trouble installing a previous version of a package, and multiple version of the package in R 2.12 or 2.15. I have download the tar.gz packages from the CRAN archive, and created an folder holding all the files. install.packages("changepoint_0.3.tar.gz", lib="~/Rtools/dir/of/pkgs/

[R] changing family distribution, but not as a part of a glm or regression model

Hi, Thanks for reading and any suggestions. I am slowly teaching myself R. I am currently modeling critical thresholds or breakpoints/switchpoints in ecological systems. I have using the strucchange package, but tweaking it for my questions at hand. What I am trying to figure out is how to tel