r软件语言入门教程

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1、R语言简介R语言笔记:数据分析与绘图的编程环境版本1.7RDevelopmentCoreTeamJune10,2006ClicktobuyNOW!PDF-XChangeViewerwww.docu-track.comClicktobuyNOW!PDF-XChangeViewerwww.docu-track.comContents1绪论与基础11.1R语言环境...............................11.2相关的软件和文档..........................11.3R与统计...

2、.............................21.4R与视窗系统.............................21.5R的交互使用.............................21.6入门训练...............................31.7获取函数和功能的帮助信息.....................31.8R的命令、对大小写的敏感，等等..................31.9对已输入命令的记忆和更改.....................41.

3、10命令文件的执行和输出的转向到文件................41.11数据的保持与对象的清除......................42简单操作；数值与向量52.1向量与赋值..............................52.2向量运算...............................52.3产生规则的序列............................62.4逻辑向量...............................72.5缺失值.............

4、....................72.6字符向量...............................72.7索引向量(indexvector);数据集子集的选择与修改.........82.8对象的其他类型............................93对象，模式和属性103.1固有属性：模式和长度........................103.2改变对象的长度............................113.3属性的获取和设置..................

5、........113.4对象的类别..............................114有序因子与无序因子124.1一个特例...............................124.2函数tapply()与ragged数组......................124.3有序因子...............................13coefficientnotgreaterthan1.3;Highefficiency:control1hourtraveltimebetwee

6、nanytwopointswithinthevariousgroupswithintheareauptohalfanhour,1-houraccesstotheairport,45minreachedthecity'smaintraffichub,externalhighwayforhalfanhourwiththemainchannelsconnectingbus1.5hoursbetweenanytwogroupsofcoreareas;Intensive:2030transitsharerateofaroun

7、d35%,2050bussharingrateof45%percent.3rdchapter,Yibincity,trafficsituationandGeneral...3.1.1citytrafficstatus1,externaltransportpassengerandcargotrafficinYibincity,trafficatthepresentmainrailway,highway,waterwayandairfourmodesofpassengerandfreighttransport,ther

8、eandculturalheritage,highlightingtheculturaltasteandshapecharacteristicsofthecityinYibin.Accordingtoforecasts,vision2050populationwillreach2.1millionpeopleinthecenterofYibincity,ur