需求：
用R语言画折线图
实现：
xiao <- read.table("d:/final.txt",header=T,sep=",")data<-xiao[order(-xiao[,2]),]Precision<-data[,1]Recall<-data[,2]plot(Recall,Precision,type="o",main="PR图",col="blue",frame.plot=TRUE) 对应的数据文件参见附件
显示图如下：
参数说明： plot(x, y, type,main,col,frame.plot...)
x:x的数据列
y:y的数据列
type包括如下：
"p" for points,
"l" for lines,
"b" for both,
"c" for the lines part alone of "b",
"o" for both ‘overplotted’,
"h" for ‘histogram’ like (or ‘high-density’) vertical lines,
"s" for stair steps,
"S" for other steps, see ‘Details’ below,
"n" for no plotting.
main：an overall title for the plot: see title.
更多参见
help(plot)