import numpy as np import matplotlib.pyplot as plt a, b = np.polyfit(x, f, 1) fx = np.array(range(xmax+1)) ff = a * fx + b plt.scatter(x, f) plt.plot(fx, ff) plt.show() 【参考】 【NumPy】回帰分析で直線近似（線形フィッティング） | アルゴリ…

ax = plt.gca() ratio = 0.618 xleft, xright = ax.get_xlim() ybottom, ytop = ax.get_ylim() ax.set_aspect(abs((xright-xleft)/(ybottom-ytop))*ratio) 【参考】 How to Change the Aspect Ratio of Image (or Axes) in Matplotlib？ - jdhao's blog