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stacked bar
import numpy as np
import matplotlib.pyplot as plt
from itertools import cycle
from six.moves import zip
def stack_bar(ax, list_of_vals, color_cyle=None, **kwargs):
"""
Generalized stacked bar graph.
kwargs are passed through to the call to `bar`
Parameters
----------
ax : matplotlib.axes.Axes
The axes to plot to
list_of_vals : iterable
An iterable of values to plot
color_cycle : iterable, optional
color_cycle is None, defaults
to `cycle(['r', 'g', 'b', 'k'])`
"""
if color_cyle is None:
color_cyle = cycle(['r', 'g', 'b', 'k'])
else:
color_cycle = cycle(color_cycle)
v0 = len(list_of_vals[0])
if any(v0 != len(v) for v in list_of_vals[1:]):
raise ValueError("All inputs must be the same length")
edges = np.arange(v0)
bottom = np.zeros(v0)
for v, c in zip(list_of_vals, color_cyle):
ax.bar(edges, v, bottom=bottom, color=c, **kwargs)
bottom += np.asarray(v)
fig, ax = plt.subplots(1, 1)
values = [(20,35,30,35,27),(25,32,34,20,25),(3,4,5,6,7)]
stack_bar(ax, values, width=1)
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