j-bowhay
diff --git a/‎lib/matplotlib/tests/baseline_images/test_axes/hexbin_linear.png
76.5 KB b/‎lib/matplotlib/tests/baseline_images/test_axes/hexbin_linear.png
76.5 KB
diff --git a/‎lib/matplotlib/tests/test_axes.py
Lines changed: 23 additions & 0 deletions b/‎lib/matplotlib/tests/test_axes.py
Lines changed: 23 additions & 0 deletions
@@ -786,6 +786,29 @@ def test_hexbin_log():
     plt.colorbar(h)
 
 
+@image_comparison(["hexbin_linear.png"], style="mpl20")
+def test_hexbin_linear():
+    # Issue #21165
+
+    # Remove this line when this test image is regenerated.
+    plt.rcParams["pcolormesh.snap"] = False
+
+    np.random.seed(19680801)
+    n = 100000
+    x = np.random.standard_normal(n)
+    y = 2.0 + 3.0 * x + 4.0 * np.random.standard_normal(n)
+
+    xmin = x.min()
+    xmax = x.max()
+    ymin = y.min()
+    ymax = y.max()
+
+    fig, ax = plt.subplots()
+    ax.axis([xmin, xmax, ymin, ymax])
+    h = ax.hexbin(x, y, marginals=True, reduce_C_function=np.sum)
+    plt.colorbar(h)
+
+
 def test_hexbin_log_clim():
     x, y = np.arange(200).reshape((2, 100))
     fig, ax = plt.subplots()