尝试在 Python 中制作 gif

Question

我正在用傅里叶级数逼近函数，希望以一种简单的方式制作不同逼近的动画 gif。使用for 和plt.savefig 命令，我为 gif 生成了不同的帧，但我无法为它们设置动画。我们的想法是获得这样的东西

Answer 1

这可以使用matplotlib.animation 来完成。

编辑

我将向您展示如何绘制 x 的偶数幂，例如 x^2、x^4 等。看看下面的例子：

import numpy as np
from matplotlib import pyplot as plt
from matplotlib import animation

# Setting up the figure, the axis, and the plot element we want to animate
fig = plt.figure()
ax = plt.axes(xlim=(-10, 10), ylim=(-10, 1000))
line, = ax.plot([], [], lw=2)

# initialization method: plot the background of each frame
def init():
    line.set_data([], [])
    return line,

# animation method.  This method will be called sequentially
pow_ = 2
def animate(i):
    global pow_
    x = np.linspace(-10, 10, 1000)
    y = x**pow_
    pow_+=2
    line.set_data(x, y)
    return line,

# call the animator.  blit=True means only re-draw the parts that have changed.
anim = animation.FuncAnimation(fig, animate, init_func=init,
                               frames=10, interval=200, blit=True)

# if you want to save this animation as an mp4 file, uncomment the line bellow
# anim.save('basic_animation.mp4', fps=30, extra_args=['-vcodec', 'libx264'])

plt.show()