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Plotting the exponential function¶
This example demonstrates how to import a local module and how images are
stacked when two plots are created in one code block. The variable N
from
the example ‘Local module’ (file local_module.py
) is imported in the code
below. Further, note that when there is only one code block in an example, the
output appears before the code block.
# Code source: Óscar Nájera
# License: BSD 3 clause
import numpy as np
import matplotlib.pyplot as plt
# You can use modules local to the example being run, here we import
# N from local_module
from local_module import N # = 100
def main():
"""Plot exponential functions."""
x = np.linspace(-1, 2, N)
y = np.exp(x)
plt.figure()
plt.plot(x, y)
plt.xlabel("$x$")
plt.ylabel(r"$\exp(x)$")
plt.title("Exponential function")
plt.figure()
plt.plot(x, -np.exp(-x))
plt.xlabel("$x$")
plt.ylabel(r"$-\exp(-x)$")
plt.title("Negative exponential\nfunction")
# To avoid matplotlib text output
plt.show()
if __name__ == "__main__":
main()