"""
=========================
Group barchart with units
=========================

This is the same example as
<a href='http://matplotlib.org/examples/api/barchart_demo.html'>
the barchart demo</a> in centimeters.
"""

import numpy as np
from basic_units import cm, inch
import matplotlib.pyplot as plt


N = 5
menMeans = (150*cm, 160*cm, 146*cm, 172*cm, 155*cm)
menStd = (20*cm, 30*cm, 32*cm, 10*cm, 20*cm)

fig, ax = plt.subplots()

ind = np.arange(N)    # the x locations for the groups
width = 0.35         # the width of the bars
p1 = ax.bar(ind, menMeans, width, color='r', bottom=0*cm, yerr=menStd)


womenMeans = (145*cm, 149*cm, 172*cm, 165*cm, 200*cm)
womenStd = (30*cm, 25*cm, 20*cm, 31*cm, 22*cm)
p2 = ax.bar(ind + width, womenMeans, width,
            color='y', bottom=0*cm, yerr=womenStd)

ax.set_title('Scores by group and gender')
ax.set_xticks(ind + width / 2)
ax.set_xticklabels(('G1', 'G2', 'G3', 'G4', 'G5'))

ax.legend((p1[0], p2[0]), ('Men', 'Women'))
ax.yaxis.set_units(inch)
ax.autoscale_view()

plt.show() 

　このサンプルを実行するときに、basic_units_org.py が必要です。取り敢えず、実行時のカレント・ディレクトリに置けば動作します。

　

Traceback (most recent call last):
  File "C:\Users\______\AppData\Local\Programs\Python\Python311\Lib
    \site-packages\matplotlib\axis.py", line 1732, in convert_units
    ret = self.converter.convert(x, self.units, self)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "M:\______\basic_units.py", line 341, in convert
    if units.ConversionInterface.is_numlike(val):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: type object 'ConversionInterface' has no attribute 'is_numlike'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "M:\______\bar_unit_demo.py", line 24, in 
    p1 = ax.bar(ind, menMeans, width, color='r', bottom=0*cm, yerr=menStd)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\______\AppData\Local\Programs\Python\Python311\Lib
    \site-packages\matplotlib\__init__.py", line 1459, in inner
    return func(ax, *map(sanitize_sequence, args), **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\______\AppData\Local\Programs\Python\Python311\Lib
    \site-packages\matplotlib\axes\_axes.py", line 2412, in bar
    y = np.asarray(self.convert_yunits(y))
                   ^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\______\AppData\Local\Programs\Python\Python311\Lib
    \site-packages\matplotlib\artist.py", line 293, in convert_yunits
    return ax.yaxis.convert_units(y)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\______\AppData\Local\Programs\Python\Python311\Lib
    \site-packages\matplotlib\axis.py", line 1734, in convert_units
    raise munits.ConversionError('Failed to convert value(s) to axis '
matplotlib.units.ConversionError: Failed to convert value(s) to axis units: 
  TaggedValue(0, BasicUnit(cm)) 

Traceback (most recent call last):
  File "C:\Program Files\Python312\Lib\site-packages\matplotlib\axis.py", 
    line 1769, in convert_units
    ret = self.converter.convert(x, self.units, self)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "E:\______\basic_units.py", line 341, in convert
    if units.ConversionInterface.is_numlike(val):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: type object 'ConversionInterface' has no attribute 'is_numlike'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "E:\______\bar_unit_demo.py", line 24, in 
    p1 = ax.bar(ind, menMeans, width, color='r', bottom=0*cm, yerr=menStd)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Python312\Lib\site-packages\matplotlib\__init__.py", 
    line 1478, in inner
    return func(ax, *map(sanitize_sequence, args), **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Python312\Lib\site-packages\matplotlib\axes\_axes.py", 
    line 2452, in bar
    y = np.asarray(self.convert_yunits(y))
                   ^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Python312\Lib\site-packages\matplotlib\artist.py", 
    line 291, in convert_yunits
    return ax.yaxis.convert_units(y)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Python312\Lib\site-packages\matplotlib\axis.py", 
    line 1771, in convert_units
    raise munits.ConversionError('Failed to convert value(s) to axis '
matplotlib.units.ConversionError: Failed to convert value(s) to axis units: 
  TaggedValue(0, BasicUnit(cm)) 

"""
=========================
Group barchart with units
=========================

This is the same example as
:doc:`the barchart</gallery/lines_bars_and_markers/barchart>` in
centimeters.

.. only:: builder_html

   This example requires :download:`basic_units.py `
"""

from basic_units import cm, inch

import matplotlib.pyplot as plt
import numpy as np

N = 5
tea_means = [15*cm, 10*cm, 8*cm, 12*cm, 5*cm]
tea_std = [2*cm, 1*cm, 1*cm, 4*cm, 2*cm]

fig, ax = plt.subplots()
ax.yaxis.set_units(inch)

ind = np.arange(N)    # the x locations for the groups
width = 0.35         # the width of the bars
ax.bar(ind, tea_means, width, bottom=0*cm, yerr=tea_std, label='Tea')

coffee_means = (14*cm, 19*cm, 7*cm, 5*cm, 10*cm)
coffee_std = (3*cm, 5*cm, 2*cm, 1*cm, 2*cm)
ax.bar(ind + width, coffee_means, width, bottom=0*cm, yerr=coffee_std,
       label='Coffee')

ax.set_title('Cup height by group and beverage choice')
ax.set_xticks(ind + width / 2, labels=['G1', 'G2', 'G3', 'G4', 'G5'])

ax.legend()
ax.autoscale_view()

plt.show() 

　Python 3.11.6 (matplotlib 3.7.1) 及び Python 3.12.0 (matplotlib 3.8.1) 共に、正常実行です。
　このサンプルを実行するときに、basic_units.py が必要です。取り敢えず、実行時のカレント・ディレクトリに置けば動作します。

　

　basic_units.py を新しいのに、入れ替えると、元の bar_unit_demo.py でも、正常に実行できます。

　

• 2023/12/12 Ver=1.04 Python 3.12.0 (matplotlib 3.8.1)で確認
• 2023/12/12 Ver=1.04 Python 3.11.6 (matplotlib 3.7.1)で確認
• 2023/04/06 Ver=1.03 Python 3.11.2 で確認
• 2020/11/03 Ver=1.01 Python 3.7.8 で確認
• 2018/12/08 Ver=1.01 初版リリース

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