1、下载R语言安装包，百度搜索：R-3.0.3 forWindows (32/64 bit)”。下载完成后打开安装，按照系统的默认选项安装完成。
2、首先要介绍的是画条形图。代码和图形如下：library(RColorBrewer)citysales <-read.csv("citysales.csv")barplot(as.matrix(citysales[,2:4]),beside=TRUE,#beside设置条形图的形状，R语言绘图第一篇介绍到了legend.text=citysales$City,#用城市名做标注args.legend=list(bty="n",horiz=TRUE),col=brewer.pal(5,"Set1"),border="white",ylim=c(0,100),ylab="Sales Revenue (1,000's of USD)",main="Sales Figures")box(bty="l")#设置边框形状的
3、下面说的是绘制点图：li水瑞侮瑜brary(reshape)citysales <-read.csv("艘早祓胂citysales.csv")sales <-melt(citysales)## 把数据设置为long formsales$color[sales[,2]=="ProductA"] <-"red"sales$color[sales[,2]=="ProductB"] <-"blue"sales$color[sales[,2]=="ProductC"] <-"violet"dotchart(sales[,3],labels=sales$City,groups=sales[,2],col=sales$color,pch=19,main="Sales Figures",xlab="Sales Revenue (1,000's of USD)")
4、下面说说争议比较大的饼图的画法。下面是代码：png("a.png")browers <-read.t锾攒揉敫able("browsers.txt",header=TRUE)browers <-browers[order(browers[,2]),]pielabels <-sprintf("%s = %3.1f%s",browers[,1],100*browers[,2]/sum(browers[,2]),"%")pie(browers[,2],labels=pielabels,clockwise=TRUE,radius=1,col=brewer.pal(7,"Set1"),border="white",cex=0.8,main="Percentage share of internet browser usage")dev.off()
