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

data = np.loadtxt('points_circle.dat')
plt.plot(data[:,0], data[:,1], 'o')

vector = np.array((2.1, 1.1))
data_trans = data + vector
plt.plot(data_trans[:,0], data_trans[:,1], 'd')
plt.show()
