diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
index b46cbce39c58..82ddc53904b3 100644
--- a/lib/matplotlib/axes/_axes.py
+++ b/lib/matplotlib/axes/_axes.py
@@ -3756,9 +3756,12 @@ def apply_mask(arrays, mask):
f"'{dep_axis}err' must not contain None. "
"Use NaN if you want to skip a value.")
- res = np.zeros(err.shape, dtype=bool) # Default in case of nan
- if np.any(np.less(err, -err, out=res, where=(err == err))):
- # like err<0, but also works for timedelta and nan.
+ # Raise if any errors are negative, but not if they are nan.
+ # To avoid nan comparisons (which lead to warnings on some
+ # platforms), we select with `err==err` (which is False for nan).
+ # Also, since datetime.timedelta cannot be compared with 0,
+ # we compare with the negative error instead.
+ if np.any((check := err[err == err]) < -check):
raise ValueError(
f"'{dep_axis}err' must not contain negative values")
# This is like
diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
index 70d1671cafa3..c1758d2ec3e0 100644
--- a/lib/matplotlib/tests/test_axes.py
+++ b/lib/matplotlib/tests/test_axes.py
@@ -4532,10 +4532,23 @@ def test_errorbar_nan(fig_test, fig_ref):
xs = range(5)
ys = np.array([1, 2, np.nan, np.nan, 3])
es = np.array([4, 5, np.nan, np.nan, 6])
- ax.errorbar(xs, ys, es)
+ ax.errorbar(xs, ys, yerr=es)
ax = fig_ref.add_subplot()
- ax.errorbar([0, 1], [1, 2], [4, 5])
- ax.errorbar([4], [3], [6], fmt="C0")
+ ax.errorbar([0, 1], [1, 2], yerr=[4, 5])
+ ax.errorbar([4], [3], yerr=[6], fmt="C0")
+
+
+@check_figures_equal()
+def test_errorbar_masked_negative(fig_test, fig_ref):
+ ax = fig_test.add_subplot()
+ xs = range(5)
+ mask = np.array([False, False, True, True, False])
+ ys = np.ma.array([1, 2, 2, 2, 3], mask=mask)
+ es = np.ma.array([4, 5, -1, -10, 6], mask=mask)
+ ax.errorbar(xs, ys, yerr=es)
+ ax = fig_ref.add_subplot()
+ ax.errorbar([0, 1], [1, 2], yerr=[4, 5])
+ ax.errorbar([4], [3], yerr=[6], fmt="C0")
@image_comparison(['hist_stacked_stepfilled.png', 'hist_stacked_stepfilled.png'])
pFad - Phonifier reborn
Pfad - The Proxy pFad of © 2024 Garber Painting. All rights reserved.
Note: This service is not intended for secure transactions such as banking, social media, email, or purchasing. Use at your own risk. We assume no liability whatsoever for broken pages.
Alternative Proxies:
Alternative Proxy
pFad Proxy
pFad v3 Proxy
pFad v4 Proxy