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Provides tools to manipulate formulas, such as getting x, y or contrasts from the model/formula, and functions to evaluate and check the marginal effects of a linear model.
Package details 


Author  Fan Yang 
Maintainer  Fan Yang <yfno1@msn.com> 
License  GPL3 
Version  1.3.0 
Package repository  View on CRAN 
Installation 
Install the latest version of this package by entering the following in R:

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