往后打算做傅里葉級數(shù)的二位擬合。。numpy,scipy沒弄好，先墊上這些。

import math,turtle

xy = [0,

? ? ? 0,1,

? ? ? 1,1,

? ? ? 2,1,

? ? ? 3,1,

? ? ? 4,1,

? ? ? 5,2,

? ? ? 6,3,

? ? ? 7,4,

? ? ? 8,5,

? ? ? 9,5,

? ? ? 10,4

? ? ? ]#0,x,y,x,y....

a = int(len(xy)/2)

c = 0

turtle.speed(speed=0)

turtle.penup()

turtle.goto(-300,0)

turtle.pendown()

turtle.goto(500,0)

turtle.goto(-500,0)

turtle.goto(-300,0)

turtle.goto(-300,500)

turtle.goto(-300,-500)

turtle.goto(-300,0)

for i in range(1,a):

? ? c = c + (xy[2*i+1]-xy[2*i-1])*(xy[2*i+2]+xy[2*i])/2

? ? turtle.goto(50*xy[2*i+1]-300,50*xy[2*i])

turtle.goto(50*(xy[2*i+1]+1)-300,50*xy[2*i+2])

print(c)