介绍R语言中sna 软件包的功能和用法的一个非常好的文章-give some details of SNa in R

统计软件R软件的入门操作手册，里面包含基本操作教程和实验数据。-The entry of the statistical software R software operations manual, which contains the basic operation of the tutorials and the experimental data.

软件工程可行性报告:说明可行性分析的必要性,简述项目的来源、现状，研发组织，要求，目标等,将该可行性分析中的术语、缩写词进行定义。-Software engineering feasibility report: Explain the need for feasibility analysis, outlining the project s origin, status, R & D organization, requirements, objectives, feasibility an