R语言读取csv中的内容

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1992年，R语言诞生。R语言是PC和Linux时代的产物，R语言和贝尔实验室开发的S语言类似，R支持一系列分析技术，包括统计分析、预测建模、数据可视化。在CRAN上可以找到众多的扩张包。

R软件的首选界面是命令行界面，通过编写脚本来调用相应的功能函数。同时，它也支持图形界面。

R语言可以用来做数据挖掘，下面我们就用它来读取birth2.csv 中的内容。

//birth2.csv

ALGERIA       ,36.4,14.6CONGO         ,37.3,8EGYPT         ,42.1,15.3GHANA         ,55.8,25.6IVORY COAST   ,56.1,33.1MALAGASY      ,41.8,15.8MOROCCO       ,46.1,18.7TUNISIA       ,41.7,10.1CAMBODIA      ,41.4,19.7CEYLON        ,35.8,8.5CHINA         ,34,11TAIWAN        ,36.3,6.1HONG KONG     ,32.1,5.5INDIA         ,20.9,8.8INDONESIA     ,27.7,10.2IRAQ          ,20.5,3.9FRANCE        ,25,6.2JAPAN         ,17.3,7JORDAN        ,46.3,6.4KOREA         ,14.8,5.7MALAYSIA      ,33.5,6.4MONGOLIA      ,39.2,11.2PHILLLIPINES  ,28.4,7.1SYRIA         ,26.2,4.3THAILAND      ,34.8,7.9VIETNAM       ,23.4,5.1CANADA        ,24.8,7.8COSTA RICA    ,49.9,8.5DOMINICAN R   ,33,8.4GUATEMALA     ,47.7,17.3HONDURAS      ,46.6,9.7MEXICO        ,45.1,10.5NICARAGUA     ,42.9,7.1PANAMA        ,40.1,8UNITED STATES ,21.7,9.6ARGENTINA     ,21.8,8.1BOLIVIA       ,17.4,5.8BRAZIL        ,45,13.5CHILE         ,33.6,11.8COLOMBIA      ,44,11.7ECUADOR       ,44.2,13.5PERU          ,27.7,8.2URUGUAY       ,22.5,7.8VENEZUELA     ,42.8,6.7AUSTRIA       ,18.8,12.8BElGIUM       ,17.1,12.7BRITAIN       ,18.2,12.2BULGARIA      ,16.4,8.2CZECHOSLOVAKIA ,16.9,9.5DENMARK       ,17.6,19.8FINLAND       ,18.1,9.2FRANCE        ,18.2,11.7E.GERMANY     ,17.5,13.7W.GERMANY     ,18.5,11.4GREECE        ,17.4,7.8HUNGARY       ,13.1,9.9IRELAND       ,22.3,11.9ITALY         ,19,10.2NETHERLANDS   ,20.9,8NORWAY        ,17.5,10POLAND        ,19,7.5PORTUGAL      ,23.5,10.8ROMANIA       ,15.7,8.3SPAIN         ,21.5,9.1SWEDEN        ,14.8,10.1SWITZERLAND   ,18.9,9.6U.S.S.R.      ,21.2,7.2YUGOSLAVIA    ,21.4,8.9AUSTRALIA     ,21.6,8.7NEW ZEALAND   ,25.5,8.8

加载相应的程序包，这些程序包里有R的内置函数，加载语法为： library（X） ; X表示程序包

//lib2.R

library(MASS)library(lpSolve)library(sampling)library(RODBC)library(survival)library(splines)library(Hmisc)library(timeDate)library(timeSeries)library(norm)library(fBasics)library(Matrix)library(rattle)library(ellipse)library(lattice)library(nnet)library(mice)library(arules)library(colorspace)library(TSP)library(gclus)library(scatterplot3d)library(grid)library(vcd)library(seriation)library(cluster)library(mvtnorm)library(stats4)library(modeltools)library(multcomp)library(mclust)library(flexmix)library(fpc)

在R软件的命令行窗口，输入语句

setwd("D://R_work//data") #设置工作区间data4 = read.table("birth2.csv",header=F, sep=",")  #读取csv文件data4    #输出向量data4中的内容

效果如下：

图（1）用R语言读取.csv文件中的内容

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