如何用R画折线图，散点图，平滑曲线图

例子：

week	1	2	3	4	5	6
x	3	8	19	24	6	1
y	1	25	21	3	2	1

要求是以week为横坐标，画出x-week，y-week的折线图，散点图及平滑曲线图。

一．散点图

## 输入数据 ##

> week<-c(1,2,3,4,5,6)

> x<-c(3,8,19,24,6,1)

> y<-c(1,25,21,3,2,1)

## 画x-week散点图 ##

> plot(week,x,col="red",pch=22,bg="yellow",xlim=c(0,6),ylim=c(0,30),lwd=2,xlab="WEEK",ylab="STUDENT",main="lesson",sub="class",col.main="green",font.main=2,asp=0,cex=1.2)；

## 结果如下 ##

## 注释 ##

col 颜色

pch symbol 属性 1-25

如何用R画折线图，散点图，平滑曲线图

xlim和ylim为坐标刻度范围

xlab和ylab为坐标标题

lwd line width for drawing symbols

main 为图标题

sub 为图下标题

col.main 为设置图标题颜色

font.main 为设置图标题字体

cel 为symble 大小

lty 为折线类型 1为实线， 2为虚线

二、折线图

## 折线图只需在plot函数中加入type=“ ？” ##

> plot(week,x,col="red",pch=22,bg="yellow",xlim=c(0,6),ylim=c(0,30),lwd=2,xlab="WEEK",ylab="STUDENT",main="lesson",sub="class",col.main="green",font.main=2,asp=0,cex=1.2,type="b",lty=1)

type

what type of plot should be drawn. Possible types are

· "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.

## 添加一条线使用函数lines（）##

>lines(week,y,col="green",pch=16,bg="yellow",xlim=c(0,6),ylim=c(0,30),lwd=2,xlab="WEEK",ylab="STUDENT",main="lesson",sub="class",col.main="green",font.main=2,asp=0,cex=1.2,type="b",lty=2)