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my001

import matplotlib.pyplot as plt
def next_dot (pos,dt):
  ans, r = dt[0], (pos[0]-dt[0][0])**2+(pos[1]-dt[0][1])**2
  for i in range(1,len(dt)):
    ri = (pos[0]-dt[i][0])**2+(pos[1]-dt[i][1])**2
    if ri < r :
      ans = dt[i]
      r = ri
  return ans
dots = [(-1,0),(2,4),(0.5,7)]
colors = [ 'red','blue','green','brown','black']
DDD = dict()
for d in dots :
  DDD[d] = []
fname = '27A_24-10.txt'
XX, YY = [], []
for s in open(fname):
  x, y = map(float, s.split())
  d = next_dot((x,y),dots) 
  DDD[d].append((x,y))
for i in range (len(dots)):
  XX, YY = [], [] 
  for xy in DDD[dots[i]] :
    XX.append(xy[0]*100)
    YY.append(xy[1]*100)
  plt.scatter(XX, YY, color=colors[i%5], marker='.')  
plt.xticks(range(-200, 300,100) )
plt.yticks(range(-100, 800,100)) 
plt.grid()
plt.show()
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27A_24-10.txt
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