Python動畫雷達圖表

Question

我正在嘗試使用Python/Matplotlib創建雷達圖表，其中可以使用matplotlib內置的動畫模塊「回放」測量數據。當數據集被遍歷時，我希望數據點沿着它們各自的軸移動。我在閱讀數據和更新圖表時遇到問題，我也找不到這樣的例子。

我附上一段代碼，應該給你什麼，我想實現一個想法：

import matplotlib.pyplot as plt 
import matplotlib.animation as animation 
from math import pi 


class SubplotAnimation(animation.TimedAnimation): 
    def __init__(self, data): 

     self.data = data 
     fig = plt.figure() 
     ax = fig.add_subplot(111, projection='polar') 

     # Figure definition 
     cat = ['A', 'B', 'C', 'D', 'E'] 
     values = [10, 10, 10, 10, 10] 

     N = len(cat) 

     x_as = [n/float(N) * 2 * pi for n in range(N)] 

     # Because our chart will be circular we need to append a copy of 
     # the first value of each list at the end of each list with data 
     values += values[:1] 
     x_as += x_as[:1] 

     plt.rc('axes', linewidth=0.5, edgecolor='#888888') # Set color of axes 

     # Create polar plot 
     ax = plt.subplot(111, projection='polar') 

     # Set clockwise rotation. That is: 
     ax.set_theta_offset(pi/2) 
     ax.set_theta_direction(-1) 

     # Set position of y-labels 
     ax.set_rlabel_position(0) 

     # Set color and linestyle of grid 
     ax.xaxis.grid(True, color="#888888", linestyle='solid', linewidth=0.5) 
     ax.yaxis.grid(True, color="#888888", linestyle='solid', linewidth=0.5) 

     # Set number of radial axes and remove labels 
     plt.xticks(x_as[:-1], []) 

     # Set yticks 
     plt.yticks([20, 40, 60, 80, 100], ["20", "40", "60", "80", "100"]) 

     # Set axes limits 
     plt.ylim(0, 100) 

     # Draw ytick labels to make sure they fit properly 
     for i in range(N): 
      angle_rad = i/float(N) * 2 * pi 

      if angle_rad == 0: 
       ha, distance_ax = "center", 10 
      elif 0 < angle_rad < pi: 
       ha, distance_ax = "left", 1 
      elif angle_rad == pi: 
       ha, distance_ax = "center", 1 
      else: 
       ha, distance_ax = "right", 1 

     ax.text(angle_rad, 100 + distance_ax, cat[i], size=10, 
       horizontalalignment=ha, verticalalignment="center") 

     animation.TimedAnimation.__init__(self, fig, interval=25, blit=True) 

     def new_frame_seq(self): 
      return iter(range(len(self.data))) 

     def _draw_frame(self, framedata): 
      ax.plot(ax, framedata) 

testdata = [[10, 20, 30, 40, 50], 
      [10, 20, 30, 40, 50], 
      [40, 50, 60, 70, 80], 
      [40, 50, 60, 70, 80], 
      [50, 60, 70, 80, 90]] 

ani = SubplotAnimation(testdata) 
plt.show() 

如何使這項工作的任何提示將不勝感激！

Answer 1

目前還不清楚TimedAnimation子類化的目標是什麼。它使事情變得太複雜。

這是一個使用FuncAnimation的動畫雷達圖的簡單示例。

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

fig = plt.figure(figsize=(4,4)) 
ax = fig.add_subplot(111, projection='polar') 
ax.set_ylim(0,100) 

data = np.random.rand(50)*6+2 
theta = np.linspace(0,2.*np.pi, num=50) 
l, = ax.plot([],[]) 

def update(i): 
    global data 
    data += (np.random.rand(50)+np.cos(i*2.*np.pi/50.))*2 
    data[-1] = data[0] 
    l.set_data(theta, data) 
    return l, 

ani = animation.FuncAnimation(fig, update, frames=50, interval=200, blit=True) 
plt.show()