Inference with linear equality and inequality constraints using R: the package ic.infer

In linear models and multivariate normal situations,prior information in linear inequality form may be encountered,or linear inequality hypotheses may be subjected to statistical tests. r package ic.infer has been developed to support inequality-constrained estimation and testing for such situations. this article gives an overview of the principles underlying inequality-constrained inference that are far less well-known than methods for unconstrained or equality-constrained models,and describes their implementation in the package.