import numpy as np
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import pytest
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import pandas.util._test_decorators as td
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from pandas import (
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DataFrame,
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date_range,
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)
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from pandas.tests.plotting.common import TestPlotBase
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from pandas.util.version import Version
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class TestFrameLegend(TestPlotBase):
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@pytest.mark.xfail(
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reason=(
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"Open bug in matplotlib "
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"https://github.com/matplotlib/matplotlib/issues/11357"
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)
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)
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def test_mixed_yerr(self):
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# https://github.com/pandas-dev/pandas/issues/39522
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import matplotlib as mpl
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from matplotlib.collections import LineCollection
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from matplotlib.lines import Line2D
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df = DataFrame([{"x": 1, "a": 1, "b": 1}, {"x": 2, "a": 2, "b": 3}])
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ax = df.plot("x", "a", c="orange", yerr=0.1, label="orange")
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df.plot("x", "b", c="blue", yerr=None, ax=ax, label="blue")
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legend = ax.get_legend()
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if Version(mpl.__version__) < Version("3.7"):
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result_handles = legend.legendHandles
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else:
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result_handles = legend.legend_handles
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assert isinstance(result_handles[0], LineCollection)
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assert isinstance(result_handles[1], Line2D)
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def test_legend_false(self):
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# https://github.com/pandas-dev/pandas/issues/40044
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import matplotlib as mpl
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df = DataFrame({"a": [1, 1], "b": [2, 3]})
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df2 = DataFrame({"d": [2.5, 2.5]})
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ax = df.plot(legend=True, color={"a": "blue", "b": "green"}, secondary_y="b")
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df2.plot(legend=True, color={"d": "red"}, ax=ax)
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legend = ax.get_legend()
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if Version(mpl.__version__) < Version("3.7"):
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handles = legend.legendHandles
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else:
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handles = legend.legend_handles
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result = [handle.get_color() for handle in handles]
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expected = ["blue", "green", "red"]
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assert result == expected
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@td.skip_if_no_scipy
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def test_df_legend_labels(self):
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kinds = ["line", "bar", "barh", "kde", "area", "hist"]
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df = DataFrame(np.random.rand(3, 3), columns=["a", "b", "c"])
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df2 = DataFrame(np.random.rand(3, 3), columns=["d", "e", "f"])
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df3 = DataFrame(np.random.rand(3, 3), columns=["g", "h", "i"])
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df4 = DataFrame(np.random.rand(3, 3), columns=["j", "k", "l"])
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for kind in kinds:
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ax = df.plot(kind=kind, legend=True)
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self._check_legend_labels(ax, labels=df.columns)
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ax = df2.plot(kind=kind, legend=False, ax=ax)
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self._check_legend_labels(ax, labels=df.columns)
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ax = df3.plot(kind=kind, legend=True, ax=ax)
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self._check_legend_labels(ax, labels=df.columns.union(df3.columns))
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ax = df4.plot(kind=kind, legend="reverse", ax=ax)
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expected = list(df.columns.union(df3.columns)) + list(reversed(df4.columns))
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self._check_legend_labels(ax, labels=expected)
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# Secondary Y
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ax = df.plot(legend=True, secondary_y="b")
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self._check_legend_labels(ax, labels=["a", "b (right)", "c"])
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ax = df2.plot(legend=False, ax=ax)
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self._check_legend_labels(ax, labels=["a", "b (right)", "c"])
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ax = df3.plot(kind="bar", legend=True, secondary_y="h", ax=ax)
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self._check_legend_labels(
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ax, labels=["a", "b (right)", "c", "g", "h (right)", "i"]
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)
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# Time Series
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ind = date_range("1/1/2014", periods=3)
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df = DataFrame(np.random.randn(3, 3), columns=["a", "b", "c"], index=ind)
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df2 = DataFrame(np.random.randn(3, 3), columns=["d", "e", "f"], index=ind)
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df3 = DataFrame(np.random.randn(3, 3), columns=["g", "h", "i"], index=ind)
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ax = df.plot(legend=True, secondary_y="b")
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self._check_legend_labels(ax, labels=["a", "b (right)", "c"])
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ax = df2.plot(legend=False, ax=ax)
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self._check_legend_labels(ax, labels=["a", "b (right)", "c"])
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ax = df3.plot(legend=True, ax=ax)
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self._check_legend_labels(ax, labels=["a", "b (right)", "c", "g", "h", "i"])
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# scatter
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ax = df.plot.scatter(x="a", y="b", label="data1")
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self._check_legend_labels(ax, labels=["data1"])
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ax = df2.plot.scatter(x="d", y="e", legend=False, label="data2", ax=ax)
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self._check_legend_labels(ax, labels=["data1"])
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ax = df3.plot.scatter(x="g", y="h", label="data3", ax=ax)
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self._check_legend_labels(ax, labels=["data1", "data3"])
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# ensure label args pass through and
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# index name does not mutate
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# column names don't mutate
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df5 = df.set_index("a")
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ax = df5.plot(y="b")
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self._check_legend_labels(ax, labels=["b"])
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ax = df5.plot(y="b", label="LABEL_b")
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self._check_legend_labels(ax, labels=["LABEL_b"])
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self._check_text_labels(ax.xaxis.get_label(), "a")
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ax = df5.plot(y="c", label="LABEL_c", ax=ax)
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self._check_legend_labels(ax, labels=["LABEL_b", "LABEL_c"])
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assert df5.columns.tolist() == ["b", "c"]
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def test_missing_marker_multi_plots_on_same_ax(self):
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# GH 18222
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df = DataFrame(data=[[1, 1, 1, 1], [2, 2, 4, 8]], columns=["x", "r", "g", "b"])
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fig, ax = self.plt.subplots(nrows=1, ncols=3)
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# Left plot
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df.plot(x="x", y="r", linewidth=0, marker="o", color="r", ax=ax[0])
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df.plot(x="x", y="g", linewidth=1, marker="x", color="g", ax=ax[0])
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df.plot(x="x", y="b", linewidth=1, marker="o", color="b", ax=ax[0])
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self._check_legend_labels(ax[0], labels=["r", "g", "b"])
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self._check_legend_marker(ax[0], expected_markers=["o", "x", "o"])
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# Center plot
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df.plot(x="x", y="b", linewidth=1, marker="o", color="b", ax=ax[1])
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df.plot(x="x", y="r", linewidth=0, marker="o", color="r", ax=ax[1])
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df.plot(x="x", y="g", linewidth=1, marker="x", color="g", ax=ax[1])
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self._check_legend_labels(ax[1], labels=["b", "r", "g"])
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self._check_legend_marker(ax[1], expected_markers=["o", "o", "x"])
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# Right plot
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df.plot(x="x", y="g", linewidth=1, marker="x", color="g", ax=ax[2])
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df.plot(x="x", y="b", linewidth=1, marker="o", color="b", ax=ax[2])
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df.plot(x="x", y="r", linewidth=0, marker="o", color="r", ax=ax[2])
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self._check_legend_labels(ax[2], labels=["g", "b", "r"])
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self._check_legend_marker(ax[2], expected_markers=["x", "o", "o"])
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def test_legend_name(self):
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multi = DataFrame(
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np.random.randn(4, 4),
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columns=[np.array(["a", "a", "b", "b"]), np.array(["x", "y", "x", "y"])],
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)
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multi.columns.names = ["group", "individual"]
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ax = multi.plot()
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leg_title = ax.legend_.get_title()
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self._check_text_labels(leg_title, "group,individual")
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df = DataFrame(np.random.randn(5, 5))
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ax = df.plot(legend=True, ax=ax)
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leg_title = ax.legend_.get_title()
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self._check_text_labels(leg_title, "group,individual")
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df.columns.name = "new"
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ax = df.plot(legend=False, ax=ax)
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leg_title = ax.legend_.get_title()
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self._check_text_labels(leg_title, "group,individual")
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ax = df.plot(legend=True, ax=ax)
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leg_title = ax.legend_.get_title()
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self._check_text_labels(leg_title, "new")
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@pytest.mark.parametrize(
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"kind",
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[
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"line",
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"bar",
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"barh",
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pytest.param("kde", marks=td.skip_if_no_scipy),
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"area",
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"hist",
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],
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)
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def test_no_legend(self, kind):
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df = DataFrame(np.random.rand(3, 3), columns=["a", "b", "c"])
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ax = df.plot(kind=kind, legend=False)
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self._check_legend_labels(ax, visible=False)
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def test_missing_markers_legend(self):
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# 14958
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df = DataFrame(np.random.randn(8, 3), columns=["A", "B", "C"])
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ax = df.plot(y=["A"], marker="x", linestyle="solid")
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df.plot(y=["B"], marker="o", linestyle="dotted", ax=ax)
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df.plot(y=["C"], marker="<", linestyle="dotted", ax=ax)
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self._check_legend_labels(ax, labels=["A", "B", "C"])
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self._check_legend_marker(ax, expected_markers=["x", "o", "<"])
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def test_missing_markers_legend_using_style(self):
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# 14563
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df = DataFrame(
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{
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"A": [1, 2, 3, 4, 5, 6],
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"B": [2, 4, 1, 3, 2, 4],
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"C": [3, 3, 2, 6, 4, 2],
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"X": [1, 2, 3, 4, 5, 6],
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}
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)
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fig, ax = self.plt.subplots()
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for kind in "ABC":
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df.plot("X", kind, label=kind, ax=ax, style=".")
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self._check_legend_labels(ax, labels=["A", "B", "C"])
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self._check_legend_marker(ax, expected_markers=[".", ".", "."])
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