I am creating a stacked line/area plot using plt.fill_between() method of the pyplot, and after trying so many things I am still not able to figure why it is not displaying any legend or labels (even when I provide them in the code). Here is the code:
import matplotlib.pyplot as plt
import numpy
a1_label = 'record a1'
a2_label = 'record a2'
a1 = numpy.linspace(0,100,40)
a2 = numpy.linspace(30,100,40)
x = numpy.arange(0, len(a1), 1)
plt.fill_between(x, 0, a1, facecolor='green')
plt.fill_between(x, a1, a2, facecolor='red')
plt.title('some title')
plt.grid('on')
plt.legend([a1_label, a2_label])
plt.show()
Here is the image generated (note that the legend shows empty box instead of labels):
Help!
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