Sep 22, 2021 · Sep 21, 2021
diff --git a/lib/matplotlib/artist.py b/lib/matplotlib/artist.py
            # Artist.format_cursor_data would always have precedence over
            # ScalarMappable.format_cursor_data.
            n = self.cmap.N
            # Midpoints of neighboring color intervals.
            neighbors = self.norm.inverse(
                (int(self.norm(data) * n) + np.array([0, 1])) / n)
            delta = abs(neighbors - data).max()
            return "[{:-#.{}g}]".format(data, cbook._g_sig_digits(data, delta))
            if np.ma.getmask(data):
                return "[]"
            normed = self.norm(data)
            if np.isfinite(normed):
                # Midpoints of neighboring color intervals.
                neighbors = self.norm.inverse(
                    (int(self.norm(data) * n) + np.array([0, 1])) / n)
                delta = abs(neighbors - data).max()
                g_sig_digits = cbook._g_sig_digits(data, delta)
            else:
                g_sig_digits = 3  # Consistent with default below.
            return "[{:-#.{}g}]".format(data, g_sig_digits)
        else:
            try:
                data[0]
diff --git a/lib/matplotlib/tests/test_image.py b/lib/matplotlib/tests/test_image.py
    "data, text", [
        ([[10001, 10000]], "[10001.000]"),
        ([[.123, .987]], "[0.123]"),
        ([[np.nan, 1, 2]], "[]"),
    ])
 def test_format_cursor_data(data, text):
    from matplotlib.backend_bases import MouseEvent

    xdisp, ydisp = ax.transData.transform([0, 0])
    event = MouseEvent('motion_notify_event', fig.canvas, xdisp, ydisp)
    assert im.get_cursor_data(event) == data[0][0]
    assert im.format_cursor_data(im.get_cursor_data(event)) == text
Original file line number	Diff line number	Diff line change
Expand Up		@@ -1274,11 +1274,18 @@ def format_cursor_data(self, data):
		# Artist.format_cursor_data would always have precedence over
		# ScalarMappable.format_cursor_data.
		n = self.cmap.N
		# Midpoints of neighboring color intervals.
		neighbors = self.norm.inverse(
		(int(self.norm(data) * n) + np.array([0, 1])) / n)
		delta = abs(neighbors - data).max()
		return "[{:-#.{}g}]".format(data, cbook._g_sig_digits(data, delta))
		if np.ma.getmask(data):
		return "[]"
		normed = self.norm(data)
		if np.isfinite(normed):
		# Midpoints of neighboring color intervals.
		neighbors = self.norm.inverse(
		(int(self.norm(data) * n) + np.array([0, 1])) / n)
		delta = abs(neighbors - data).max()
		g_sig_digits = cbook._g_sig_digits(data, delta)
		else:
		g_sig_digits = 3 # Consistent with default below.
		return "[{:-#.{}g}]".format(data, g_sig_digits)
		else:
		try:
		data[0]
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Original file line number	Diff line number	Diff line change
Expand Up		@@ -340,6 +340,7 @@ def test_cursor_data():
		"data, text", [
		([[10001, 10000]], "[10001.000]"),
		([[.123, .987]], "[0.123]"),
		([[np.nan, 1, 2]], "[]"),
		])
		def test_format_cursor_data(data, text):
		from matplotlib.backend_bases import MouseEvent
Expand All		@@ -349,7 +350,6 @@ def test_format_cursor_data(data, text):

		xdisp, ydisp = ax.transData.transform([0, 0])
		event = MouseEvent('motion_notify_event', fig.canvas, xdisp, ydisp)
		assert im.get_cursor_data(event) == data[0][0]
		assert im.format_cursor_data(im.get_cursor_data(event)) == text


Expand Down