matplotlib/pyplot - make axes (ordinate and abscissa) bold

Question

Is there a way to make the x=0 and y=0 (the ordinate and abscissa) axes in a Cartesian plot bold?

For example, a simple plot is:

x = np.arange(0.01, 5, 0.1)
y = np.log(x)
plt.plot(x,y)
plt.grid()

Which looks like:

I can add this 'hack':

x = np.arange(0.01, 5, 0.1)
y = np.log(x)
plt.plot(x,y)
plt.grid()

plt.plot(x,0*x, 'k')
plt.plot(x*0,x, 'k')
plt.plot(x*0,-x, 'k')

Then I get:

Is there a way to make this a bit less hacky - an API or a more sophisticated solution?

Answer 1

Please see the code below:

fig, ax = plt.subplots(1, 1, figsize=(9, 9))
ax.plot(x, y)
ax.grid(True)
ax.axhline(y=0, lw=5, color='k')
ax.axvline(x=0, lw=5, color='k')

From a practical view, I always use artist to make matplotlib plots, making adjustment of properties much easier.

Answer 2

不错的答案，我想补充一下，除了调整lw设置线宽以供选择外，您还可以在axhline和axvline关键字中传递color （例如color='k' ）以保持黑色