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Line Plots

The code below displays three line plots: linear (black solid line), quadratic (black dashed line), and cubic (black dotted line).

import matplotlib.pyplot as plt
from numpy import array
x_grid = array(range(1, 100)) / 30.0
plt.figure() # open a figure
plt.plot(x_grid, x_grid, "k-") # draws a solid line
plt.plot(x_grid, x_grid ** 2, "k--") # draws a dashed line
plt.plot(x_grid, x_grid ** 3, "k.") # draws a dotted line
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