Karl J. Ellefsen 2017 <p>MapMark4 is a software package that implements the probability calculations in three-part mineral resource assessments. Functions within the software package are written in the R statistical programming language. These functions, their documentation, and a copy of this user’s guide are bundled together in R’s unit of shareable code, which is called a “package.” This user’s guide includes step-by-step instructions showing how the functions are used to carry out the probability calculations. The calculations are demonstrated using test data, which are included in the package.</p> application/pdf 10.3133/tm7C14 en U.S. Geological Survey User’s guide for MapMark4—An R package for the probability calculations in three-part mineral resource assessments reports