Is there a simple way to put the y-axis label on the right-hand side of the plot? I know that this can be done for the tick labels using ax.yaxis.tick_right(), but I would like to know if it can be done for the axis label as well.
One idea which came to mind was to use
ax.yaxis.tick_right()
ax2 = ax.twinx()
ax2.set_ylabel('foo')
However, this doesn't have the desired effect of placing all labels (tick and axis labels) on the right-hand side, while preserving the extent of the y-axis. In short, I would like a way to move all the y-axis labels from the left to the right.
It looks like you can do it with:
ax.yaxis.set_label_position("right")
ax.yaxis.tick_right()
See here for an example.
If you would like to follow the example given in matplotlib and create a figure with labels on both sides of the axes but without having to use the subplots() function, here is my solution :
from matplotlib import pyplot as plt
import numpy as np
ax1 = plt.plot()
t = np.arange(0.01, 10.0, 0.01)
s1 = np.exp(t)
plt.plot(t,s1,'b-')
plt.xlabel('t (s)')
plt.ylabel('exp',color='b')
ax2 = ax1.twinx()
s2 = np.sin(2*np.pi*t)
ax2.plot(t, s2, 'r.')
plt.ylabel('sin', color='r')
plt.show()
来源：https://stackoverflow.com/questions/13369888/matplotlib-y-axis-label-on-right-side