目录
- Generic X-Y plot定义
- 1 添加x、y标签
- 2 添加主标题，参数main
- 3 添加副标题，参数sub
- 4 添加颜色，参数col
- 5 添加xy轴显示限制，参数xlim
- 6 图状、点状、线状
- 7 平滑曲线
- 8 画函数图像
Generic X-Y plot定义
plot(x, y, ...) # ?plot 请查看帮助文档
代码及结果：
#打开数据集前6行
head(cars)
cars数据集
plot(x,y)
plot(x = cars$speed, y = cars$dist)
speed为x,dist为y
plot(x = cars$dist, y = cars$speed)
#It probably makes more sense for speed to go on the x-axis since stopping distance is a function of speed #more than the other way around
dist为x,speed为y
1 添加x、y标签
#添加x、y标签
plot(x = cars$speed, y = cars$dist, xlab = "Speed", ylab = "Distance")
添加x、y标签
2 添加主标题，参数main
#添加主标题，参数main
plot(x = cars$speed, y = cars$dist,xlab = "Speed", ylab = "Stopping Distance", main = "My Plot")
添加主标题
3 添加副标题，参数sub
#添加副标题，参数sub
plot(cars, main = "My Plot", sub ="My Plot Subtitle")
添加副标题
4 添加颜色，参数col
#添加颜色，参数col
plot(cars, col = 2)
添加颜色
5 添加xy轴显示限制，参数xlim
#添加xy轴显示限制，参数xlim
plot(cars, xlim = c(10,15))
添加xy轴显示限制
6 图状、点状、线状
type 图形状9种
pch 点形状25种
lty 线形状6种
点的大小
# pch & lty &type &cex
plot(1:10,pch = c("@","$","#","&","%"), type = "b", lty = 3, cex =0.5, main = "Sarge says to Beetle...")
点、线、类型设置
7 平滑曲线
require(stats) # for lowess, rpois, rnorm
plot(cars)
lines(lowess(cars)) #R平滑曲线的方法之一lowess()
R平滑曲线
8 画函数图像
plot(sin, -pi, 2*pi) # see ?plot.function
sin(x), x [-pi, 2*pi]
# 泊松分布100个观测值，lambda = 5
plot(table(rpois(100, 5)), type = "h", col = "red", lwd = 5,
main = "rpois(100, lambda = 5)")
泊松分布
参考文章：
coursera R programming week4