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+--- Thread: Tuple Unpacking with graphs in matplotlib (/thread-2540.html)
Tuple Unpacking with graphs in matplotlib - smw10c - Mar-23-2017
I hope you are all having a good day. I am currently taking a MOOC on Python. We went over a bit of code in matplotlib:
Fig=plt.figure()
Fig,axes=plt.subplots(nrows=1,ncols=2)
The instructor said that "fig, axes" is a way of doing tuple unpacking. I know what tuple unpacking is, however, I don't understand it in this context. If someone could please explain it would be greatly appreciated.
RE: Tuple Unpacking with graphs in matplotlib - zivoni - Mar-23-2017
plt.subplots() returns tuple containg figure object and arrray of axis objects (if atleast one of nrows or ncols is > 1).When you want plot with two subplots in one row, you use
fig, axes = plt.subplots(1,2), unpacking assigns figure into fig and axis array into axes. After that you can use axes to access specified subplots, while fig is used to control entire figure. Simple example:import numpy as np
import matplotlib.pyplot as plt
x = np.linspace(-2, 2, 400)
fig, axes = plt.subplots(1,2)
axes[0].plot(x, x**2)
axes[1].plot(x, x**3)
fig.savefig('boo.png', dpi=200)[Image: OOKQKp8.png]
RE: Tuple Unpacking with graphs in matplotlib - smw10c - Mar-23-2017
(Mar-23-2017, 04:51 PM)zivoni Wrote:plt.subplots()returns tuple containg figure object and arrray of axis objects (if atleast one of nrows or ncols is > 1). When you want plot with two subplots in one row, you usefig, axes = plt.subplots(1,2), unpacking assigns figure into fig and axis array into axes. After that you can use axes to access specified subplots, while fig is used to control entire figure. Simple example:import numpy as np import matplotlib.pyplot as plt x = np.linspace(-2, 2, 400) fig, axes = plt.subplots(1,2) axes[0].plot(x, x**2) axes[1].plot(x, x**3) fig.savefig('boo.png', dpi=200)[Image: OOKQKp8.png]
That was exceedingly helpful. Thank you!