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BUG: Cast ExtensionArray to numpy ndarray before plot #25590

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Merged
merged 12 commits into from
Mar 15, 2019
Merged

BUG: Cast ExtensionArray to numpy ndarray before plot #25590

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b3445fc
Cast `ExtensionArray` to `nd.array` before plot.
sighingnow Mar 7, 2019
7072085
Revise.
sighingnow Mar 8, 2019
ff7314d
Remove unused import to fix the lint error.
sighingnow Mar 8, 2019
f97772f
Fix import order, revise the patch and add test with more kinds of pl…
sighingnow Mar 9, 2019
5fe4f19
Merge branch 'master' into fix-25587
sighingnow Mar 12, 2019
755e8da
Fix the import order in tests.
sighingnow Mar 12, 2019
6cf16e6
Fix CI.
sighingnow Mar 12, 2019
10e9b54
Move to 0.25.0.
sighingnow Mar 13, 2019
2c1fd7d
Copy the df and transform all columns to np.array.
sighingnow Mar 14, 2019
aafd214
Remove unused import.
sighingnow Mar 14, 2019
4095c8c
Merge branch 'master' into fix-25587
sighingnow Mar 14, 2019
3afc9eb
Rename the variable.
sighingnow Mar 14, 2019
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1 change: 1 addition & 0 deletions doc/source/whatsnew/v0.25.0.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -225,6 +225,7 @@ I/O
Plotting
^^^^^^^^

- Fixed bug where :class:`api.extensions.ExtensionArray` could not be used in matplotlib plotting (:issue:`25587`)
-
-
-
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7 changes: 6 additions & 1 deletion pandas/plotting/_core.py
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Expand Up @@ -365,6 +365,12 @@ def _compute_plot_data(self):
if is_empty:
raise TypeError('no numeric data to plot')

# GH25587: cast ExtensionArray of pandas (IntegerArray, etc.) to
# np.ndarray before plot.
numeric_data = numeric_data.copy()
for col in numeric_data:
numeric_data[col] = np.asarray(numeric_data[col])

self.data = numeric_data

def _make_plot(self):
Expand Down Expand Up @@ -1794,7 +1800,6 @@ def _plot(data, x=None, y=None, subplots=False,
)
label_name = label_kw or data.columns
data.columns = label_name

plot_obj = klass(data, subplots=subplots, ax=ax, kind=kind, **kwds)

plot_obj.generate()
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21 changes: 20 additions & 1 deletion pandas/tests/plotting/test_frame.py
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Expand Up @@ -18,6 +18,7 @@
import pandas as pd
from pandas import (
DataFrame, MultiIndex, PeriodIndex, Series, bdate_range, date_range)
from pandas.core.arrays import integer_array
from pandas.tests.plotting.common import (
TestPlotBase, _check_plot_works, _ok_for_gaussian_kde,
_skip_if_no_scipy_gaussian_kde)
Expand Down Expand Up @@ -144,8 +145,26 @@ def test_plot(self):
result = ax.axes
assert result is axes[0]

# GH 15516
def test_integer_array_plot(self):
# GH 25587
arr = integer_array([1, 2, 3, 4], dtype="UInt32")

s = Series(arr)
_check_plot_works(s.plot.line)
_check_plot_works(s.plot.bar)
_check_plot_works(s.plot.hist)
_check_plot_works(s.plot.pie)

df = DataFrame({'x': arr, 'y': arr})
_check_plot_works(df.plot.line)
_check_plot_works(df.plot.bar)
_check_plot_works(df.plot.hist)
_check_plot_works(df.plot.pie, y='y')
_check_plot_works(df.plot.scatter, x='x', y='y')
_check_plot_works(df.plot.hexbin, x='x', y='y')

def test_mpl2_color_cycle_str(self):
# GH 15516
colors = ['C' + str(x) for x in range(10)]
df = DataFrame(randn(10, 3), columns=['a', 'b', 'c'])
for c in colors:
Expand Down