信使
输入语句：
s=read.table("tt,txt")
s
得到数据
1 r r 0.9414507 -1.0000000 0.9878664 1.2417942 -1.0000000 1.2681175
2 r r 1.2118203 -2.0000000 1.9972817 0.6224403 -2.0000000 1.7184890
3 r r 1.3915503 -3.0000000 2.7713220 -0.0722998 -3.0000000 2.0709255
4 r r 0.7762750 -4.0000000 2.2391912 -0.8158167 -4.0000000 2.3134922
5 r r 0.5795051 -5.0000000 2.9824254 -0.4443532 -5.0000000 2.8067454
6 r r -0.1188236 -2.0792158 2.8325954 -0.1188236 -2.8000871 4.1722949
7 r r -0.2565969 -2.7788412 3.3743887 -0.0354433 -3.5210146 3.9035838
8 r r -1.1297393 -2.8498716 3.3418500 -0.0669063 -4.4538135 3.3665519
9 r r -1.9449120 -2.1650822 3.3911118 0.6390852 -5.3494359 2.9018966
10 r r -0.3887895 -1.4744566 3.2975328 1.0980699 -4.7379204 3.9755641
11 r r -1.1554952 -1.1709247 3.3718260 2.1260064 -4.3808579 3.7728644
12 r r -0.4698679 -1.5282239 3.1732361 2.3806014 -5.2794623 4.2461083
13 r r -1.3589763 -1.6976141 3.1181909 2.0284970 -5.1559739 4.5917450
14 - r -1.6742123 -1.5761532 2.8616739 1.7896450 -5.0689234 4.2770942
然后输入：
x1=s[,1]
y1=s[,4]]
x2=s[,1]
y2=[,5]
请教：如何利用plot()函数，把（x1,y1）、（x2,y2）画在一个坐标框内同时显示？
beerbottle
额。。R绘图命令不像Matlab那个。
有大侠说用lines()低级绘图函数可以。
你可以尝试一下:
plot(x1,y1,type='l')
lines(x2,y2)
