[Matplotlib-users] bug with bar graph when plotting zero values?

[Paul T. <pau...@gm...>]

I noticed today that when I create a bar graph with zero values that the
labels don't align correctly:

import matplotlib.pyplot as plt
import numpy as np

fig = plt.figure()
names = ['name a', 'name b', 'name c', 'named', 'name e', 'name f']
defects = [0, 0, 0, 5, 6, 7]
ax = fig.add_subplot(111)
widths=.75
ind = np.arange(len(defects))  # the x locations for the groups
ind = ind +  widths
bar = ax.bar(ind, defects, width=widths)
plt.xticks(ind + widths/2.0 , names, rotation=90)
ax.set_xlabel('Sorter')
ax.set_ylabel('Percentage (Average)')
plt.subplots_adjust( bottom=0.30)
ax.yaxis.grid(True, linestyle='-', which='major', color='lightgrey',
alpha=0.5)
ax.set_axisbelow(True)
plt.savefig('temp.png')

defects = [1, 2, 3, 5, 6, 7]
# same code...

When run with the defects with non zero values, the labels appear as I
expect; with zero values, the left label aligns incorrectly with the y axis.

Thanks

P.