I can add a y label to the left y-axis using plt.ylabel
, but how can I add it to the secondary y-axis?
table = sql.read_frame(query,connection) table[0].plot(color=colors[0],ylim=(0,100)) table[1].plot(secondary_y=True,color=colors[1]) plt.ylabel('$')
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Answer
The best way is to interact with the axes
object directly
import numpy as np import matplotlib.pyplot as plt x = np.arange(0, 10, 0.1) y1 = 0.05 * x**2 y2 = -1 *y1 fig, ax1 = plt.subplots() ax2 = ax1.twinx() ax1.plot(x, y1, 'g-') ax2.plot(x, y2, 'b-') ax1.set_xlabel('X data') ax1.set_ylabel('Y1 data', color='g') ax2.set_ylabel('Y2 data', color='b') plt.show()