如何制作李沙育曲线的动画 [英] How to make an animation of a Lissajous curve

问题描述

我想用参数化制作一个曲线动画（在其中递增绘制）：x（t）= sin（3t）和y（y）= sin（4t），其中t [0，2pi]。

I want to make an animation of the curve (where you incrementally draw it) with parametrization: x(t) = sin(3t) and y(y) = sin(4t) where t[0, 2pi].

尝试：

%matplotlib notebook

import matplotlib.pyplot as plt
import math
import numpy as np

# set the minimum potential
rm = math.pow(2, 1 / 6)
t = np.linspace(-10, 10, 1000, endpoint = False)
x = []
y = []

for i in len(t): #TypeError 'int' object is not iterable
    x_i = np.sin( 3 * t[i] )
    y_i = np.sin( 4 * t[i] )
    x.append(x_i)
    y.append(y_i)

# plot the graph
plt.plot(x,y)

# set the title
plt.title('Plot sin(4t) Vs sin(3t)')

# set the labels of the graph
plt.xlabel('sin(3t)')
plt.ylabel('sin(4t)')

# display the graph
plt.show()

但是TypeError'int'对象不是可迭代的...我该如何解决？

But TypeError 'int' object is not iterable springs up... How can I fix it?

谢谢

推荐答案

您要遍历一个完整的整数er（len（t）中的 i ）

You're trying to iterate over an integer (i in len(t))

相反，您需要遍历数组：

Instead, you need to be iterating over the array:

for i in t:
    x_i = np.sin( 3 * i )
    y_i = np.sin( 4 * i )
    x.append(x_i)
    y.append(y_i)

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