粒子の移動を２次元的にプロットするサンプル

import numpy as np
  import matplotlib.pyplot as plt
  import csv
  import pprint
  
  file_pairs = [('./csv-000060.csv','./csv-008460.csv'),
                ('./csv-000060.csv','./csv-008460.csv'),
                ('./csv-000060.csv','./csv-008460.csv'),
                ('./csv-000060.csv','./csv-008460.csv')]
  
  titles =  ['Case-A','Case-B','Case-C','Case-D']
  
  figure, axes = plt.subplots(2,2, figsize=(5,5))
  
  for n, file_pair in enumerate(file_pairs):
      px, py = [],[]
      for file in file_pair:
          with open(file) as f:
              reader = csv.reader(f)
              next(reader)
              x,y = np.array([list(map(float, row)) for row in reader]).transpose()[6:8]
              px.append(x)
              py.append(y)
  
  
      draw_circle = plt.Circle((7100, 6100), 6000,fill="gray", alpha=0.1, edgecolor="k")
      axe = axes[int(np.floor(n/2)),n%2]
      axe.set_title(titles[n],y=0.92)
      axe.set_xlim(0,14000)
      axe.set_ylim(0,13000)
      axe.set_aspect(1)
      axe.add_artist(draw_circle)
      axe.axis('off')
  
      axe.scatter(px[0],py[0],c="k", alpha=0.8, s=5)
      axe.scatter(px[1],py[1],c="0.5", alpha=0.8, s=5)
  plt.tight_layout()
  plt.savefig('particle_movement.png')
  plt.show()