contrast
A Collection of Contrast Methods
One degree of freedom contrasts for 'lm', 'glm', 'gls', and 'geese' objects.
contrast contains a set of functions that can make 1 degree of freedom contrasts for several type sof models. The package extends the contrast() function from the rms package.
To install it, use:
install.packages("contrast")
## For the devel version:
require(devtools)
install_github("Alanocallaghan/contrast")