# 2D-kromme import matplotlib.pyplot as plt import numpy as np fig = plt.figure (figsize = (4, 4)) data = np.loadtxt ('020106000072_830.txt') ax = fig.add_subplot () ax.set_aspect ("equal") ax.set_xlim ([-1.70, -1.50]) ax.set_ylim ([-0.10, 0.10]) plt.plot (data[:,0], data[:,1], color = "red") plt.show ()