[英]How can I plot a line of best fit using matplotlib in Python?
[英]how to plot line of best fit using loglog in python matplotlib
使用此代码:
x = np.array([1, 2, 7, 5, 8])
y = np.array([ 5, 4, 6, 7, 10 ])
x = np.log(x)
y = np.log(y)
m, b = np.polyfit(x, y, 1)
plt.plot(x, y, 'o')
plt.plot(x, m*x + b)
但我想让轴刻度为非对数值,所以我认为这会起作用:
x = np.array([1, 2, 7, 5, 8])
y = np.array([ 5, 4, 6, 7, 10 ])
m, b = np.polyfit(x, y, 1)
plt.loglog()
plt.plot(x, y, 'o')
plt.plot(x, m*x + b)
但我得到了这个:
如何在对数刻度中制作最佳拟合线,但使用非对数轴刻度?
如果我理解正确,您可以将xticks
/ yticks
设置为xticklabels
/ yticklabels
的指数:
x = np.log(x)
y = np.log(y)
m, b = np.polyfit(x, y, 1)
fig, ax = plt.subplots()
ax.plot(x, y, 'o')
ax.plot(x, m*x + b)
ax.set_xticklabels([f'{tick:.1f}' for tick in np.exp(ax.get_xticks())])
ax.set_yticklabels([f'{tick:.1f}' for tick in np.exp(ax.get_yticks())])
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