This post describes the design and usage of the sppmix package, which defines classes and methods for spatial point pattern data and mixture models. You can install the package by this command. devtools::install_github("wangyuchen/sppmix") A two dimensional normal mixture is a basic building block of this package. We created a S3 class normmix and related methods for operations with normal mixture. In this post, you’ll learn everything that related to a normmix object.