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"""
Illustration of upper and lower limit symbols on errorbars
"""
import numpy as np
import matplotlib.pyplot as plt
fig = plt.figure(0)
x = np.arange(10.0)
y = np.sin(np.arange(10.0)/20.0*np.pi)
plt.errorbar(x, y, yerr=0.1)
y = np.sin(np.arange(10.0)/20.0*np.pi) + 1
plt.errorbar(x, y, yerr=0.1, uplims=True)
y = np.sin(np.arange(10.0)/20.0*np.pi) + 2
upperlimits = np.array([1, 0]*5)
lowerlimits = np.array([0, 1]*5)
plt.errorbar(x, y, yerr=0.1, uplims=upperlimits, lolims=lowerlimits)
plt.xlim(-1, 10)
fig = plt.figure(1)
x = np.arange(10.0)/10.0
y = (x + 0.1)**2
plt.errorbar(x, y, xerr=0.1, xlolims=True)
y = (x + 0.1)**3
plt.errorbar(x + 0.6, y, xerr=0.1, xuplims=upperlimits, xlolims=lowerlimits)
y = (x + 0.1)**4
plt.errorbar(x + 1.2, y, xerr=0.1, xuplims=True)
plt.xlim(-0.2, 2.4)
plt.ylim(-0.1, 1.3)
plt.show()
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