When we consider a call to plt.subplots() with a 2x2 grid:
def pltpoc():
import matplotlib.pyplot as plt
x = np.linspace(0,2*np.pi,10)
y = np.sin(x)
fig, axs = plt.subplots(2, 2)
axs[0, 0].plot(x, y)
axs[0, 0].set_title('Axis [0,0]')
axs[0, 1].plot(x, y, 'tab:orange')
axs[0, 1].set_title('Axis [0,1]')
axs[1, 0].plot(x, -y, 'tab:green')
axs[1, 0].set_title('Axis [1,0]')
axs[1, 1].plot(x, -y, 'tab:red')
axs[1, 1].set_title('Axis [1,1]')
plt.show()
pltpoc()
Things look swell:
There seems to be a different behavior for the axes returned by plt.subplots() when the number of rows is only 1. Consider this updated code with the only difference that it has one row not two:
def pltpoc1():
import matplotlib.pyplot as plt
x = np.linspace(0,2*np.pi,10)
y = np.sin(x)
fig, axs = plt.subplots(1, 2)
axs[0, 0].plot(x, y)
axs[0, 0].set_title('Axis [0,0]')
axs[0, 1].plot(x, y, 'tab:orange')
axs[0, 1].set_title('Axis [0,1]')
plt.show()
pltpoc1()
Now we have a completely different behavior:
Traceback (most recent call last): File "/usr/local/lib/python3.7/site-packages/IPython/core/interactiveshell.py", line 3296, in run_code
exec(code_obj, self.user_global_ns, self.user_ns) File "<ipython-input-3-434adc6ec1d8>", line 1, in <module>
pltpoc1() File "<ipython-input-2-3b01fe0b14d2>", line 6, in pltpoc1
axs[0, 0].plot(x, y) IndexError: too many indices for array
So .. why is one row "special" ?
