【注1】采用函數描點法繪制圖像，最后一篇。要實現其他的函數圖像使用turtle海龜庫繪制，在代碼中替換成相應的函數表達式即可。
【注2】采用點動成線的原理繪制，密集的描點即可！
1.SinDot.py
import turtle
import math
turtle.speed(0)
turtle.delay(0)
turtle.tracer(False)
i=-150
while(i<=150):
i=i+0.1
turtle.penup()
y = 60*math.sin(0.06*i+0.5)+20
turtle.goto(i,y)
turtle.pendown()
turtle.dot(4)
turtle.penup()
turtle.goto(0,0)
turtle.pendown()
turtle.seth(90)
turtle.fd(230)
turtle.seth(-70)
turtle.fd(15)
turtle.penup()
turtle.goto(0,230)
turtle.pendown()
turtle.seth(-110)
turtle.fd(15)
turtle.penup()
turtle.goto(0,0)
turtle.pendown()
turtle.seth(-90)
turtle.fd(90)
turtle.penup()
turtle.goto(0,0)
turtle.pendown()
turtle.seth(0)
turtle.fd(150)
turtle.seth(-160)
turtle.fd(15)
turtle.penup()
turtle.goto(150,0)
turtle.pendown()
turtle.seth(160)
turtle.fd(15)
turtle.penup()
turtle.goto(0,0)
turtle.pendown()
turtle.seth(-180)
turtle.fd(150)
turtle.penup()
turtle.goto(0,-120)
turtle.write("正弦函數方程圖像:y = 60*math.sin(0.06*i+0.5)+20",True,align="center")
turtle.goto(0,-300)
turtle.done()
2.結果示例
