计算圆形或方向性的数据描述和统计推断。 描述性与推论性统计进行分析对直线和圆形分析-Compute descr iptive and inferential statistics for circular or directional data.

主要内容是教读者如何在R语言中实现数量生态学基本方法（数据描述性统计、关联测度计算）和高级方法（聚类分析、排序分析和空间分析）。(The main content is to teach readers how to implement the basic methods of Quantitative Ecology (data descr iptive statistics, association measure calculation) and advanced methods (clu

statat代码，五因子模型分析，账面市值比、规模效应、盈利能力、投资风格(The stata code of the five-factor model, including the 5 quintiles of each factor, the group descr iptive statistics, and the mean t test and the factor redundancy check code)

通过对2000~2015 年末在我国大陆上映的电影的票房进行分析，研究电影类型、导演、演员、电影评分、上映档期、出品地区、国内生产总值和城镇居民可支配收入等因素对电影票房的影响，结果表明，热门档期上映对电影票房有促进作用，网上评分对电影票房的贡献突出，城镇人均可支配收入的提高对电影票房也有促进作用。(Through 2000-2015 By analyzing the box office of films released in mainland China at the end of the