函数plot()用法

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一个基本例子

药物基本剂量与响应关系

dose <-c(20,30,40,45,60)
drugA<-c(16,20,27,40,60)
drugB<-c(15,18,25,31,40)
plot(dose,drugA,type = "b")

plot()用法

• plot()函数的基本形式：plot(x,y,…)
  基本含义是，将x置于横轴，y置于纵轴，绘制(x,y)的点集，然后用线段将其连接起来。

• 参数“…”，是用来说明画出什么类型的图形。
  具体用法如下：

1. “p”for points,eg:

plot(dose,drugA,type = "p")

2. “l”for lines,eg:

plot(dose,drugA,type = "l")

3. “b”for both,eg:

plot(dose,drugA,type = "b")

4. “c”for lines part alone of “b”,eg:

plot(dose,drugA,type = "c")

5. “o” for both ‘overplotted’,eg:

plot(dose,drugA,type = "o")

6. “h” for ‘histogram’ like (or ‘high-density’) vertical lines,eg:

plot(dose,drugA,type = "h")

7. “s”for stair steps,

   “S”for other steps,eg:

plot(dose,drugA,type = "s")

plot(dose,drugA,type = "S")

8. “n”for no plotting;

plot(dose,drugA,type = "n")