Matplotlib 没有绘制任何东西

Question

我正在尝试为张量日志中的一些数据制作一个带有 3 个子图的图形。我已经制作了生成器和动画函数，它们似乎产生了正确的数据，但是当我这样做时 plt.show()，绘图上没有任何显示，当我尝试另存为 mp4 时，生成的视频上没有绘制任何内容，并且它只迭代到第 100 个值（共 609 个）然后停止。

这是最小代码：

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

def gendat():

    res = list(np.random.random_sample(size=609))
    lens = list(np.random.random_sample(size=609))
    loss = list(np.random.random_sample(size=609))
    for i, (r, le, lo) in enumerate(zip(res,lens,loss)):
        yield i, r, le , lo


figure, axis = plt.subplots(1,3, figsize=(15,5))

line1, = axis[0].plot([],[])
axis[0].set_xlabel("Episodes")
axis[0].set_ylabel("Average Reward")
axis[0].set_title("Reward")

line2, = axis[1].plot([],[])
axis[1].set_xlabel("Episodes")
axis[1].set_ylabel("Average Episode Length")
axis[1].set_title("Episode Length")

line3, = axis[2].plot([],[])
axis[2].set_xlabel("Episodes")
axis[2].set_ylabel("Average Loss")
axis[2].set_title("Loss")

line = [line1,line2,line3]

def init():
    line[0].set_data([],[])
    line[1].set_data([],[])
    line[2].set_data([],[])

    return line

figure.tight_layout()

def animate(dat):

    i,r, le , lo = dat

    print("got",i,r,le,lo)
    line[0].set_data(i,r)
    line[1].set_data(i,le)
    line[2].set_data(i,lo)

    return line

FFwriter = matplotlib.animation.FFMpegWriter(fps=30, extra_args=['-vcodec', 'libx264'])
ani = matplotlib.animation.FuncAnimation(figure, animate, init_func=init, frames=gendat, interval=20, repeat=False, blit=True)

plt.show()

ani.save("results.mp4",writer=FFwriter, dpi=500)
#plt.savefig("results.png",transparent=True, dpi=500)

Answer 1

需要解决两件事：

所有子图的轴限制。
set_data 需要坐标列表，而不是数字！

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

N = 609
def gendat():

    res = list(np.random.random_sample(size=609))
    lens = list(np.random.random_sample(size=609))
    loss = list(np.random.random_sample(size=609))
    for i, (r, le, lo) in enumerate(zip(res,lens,loss)):
        yield i, r, le , lo


figure, axis = plt.subplots(1,3, figsize=(15,5))

line1, = axis[0].plot([],[])
axis[0].set_xlabel("Episodes")
axis[0].set_ylabel("Average Reward")
axis[0].set_title("Reward")
axis[0].set_xlim(0, N)
axis[0].set_ylim(-10, 10)

line2, = axis[1].plot([],[])
axis[1].set_xlabel("Episodes")
axis[1].set_ylabel("Average Episode Length")
axis[1].set_title("Episode Length")
axis[1].set_xlim(0, N)
axis[1].set_ylim(-10, 10)

line3, = axis[2].plot([],[])
axis[2].set_xlabel("Episodes")
axis[2].set_ylabel("Average Loss")
axis[2].set_title("Loss")
axis[2].set_xlim(0, N)
axis[2].set_ylim(-10, 10)

line = [line1,line2,line3]

def init():
    line[0].set_data([],[])
    line[1].set_data([],[])
    line[2].set_data([],[])

    return line

figure.tight_layout()

def append_to_line(line, x, y):
    xd, yd = [list(t) for t in line.get_data()]
    xd.append(x)
    yd.append(y)
    line.set_data(xd, yd)
    print(xd)
    
def animate(dat):
    i, r, le, lo = dat

    append_to_line(line[0], i, r)
    append_to_line(line[1], i, le)
    append_to_line(line[2], i, lo)

# FFwriter = matplotlib.animation.FFMpegWriter(fps=30, extra_args=['-vcodec', 'libx264'])
ani = matplotlib.animation.FuncAnimation(figure, animate, frames=gendat, interval=20, repeat=False)

plt.show()

ani.save("results.mp4",writer=FFwriter, dpi=500)

Matplotlib 没有绘制任何东西

Matplotlib not plotting anything

python

matplotlib

matplotlib-animation