ENH: Add np.histogram_bin_edges (#10591)

Fixes #10183

Documentation is copied from np.histogram

1 files changed, 15 insertions, 1 deletions

diff --git a/numpy/lib/tests/test_histograms.py b/numpy/lib/tests/test_histograms.py
index a2c684a20..4f7af214c 100644
--- a/numpy/lib/tests/test_histograms.py
+++ b/numpy/lib/tests/test_histograms.py
@@ -2,7 +2,7 @@ from __future__ import division, absolute_import, print_function
 
 import numpy as np
 
-from numpy.lib.histograms import histogram, histogramdd
+from numpy.lib.histograms import histogram, histogramdd, histogram_bin_edges
 from numpy.testing import (
     run_module_suite, assert_, assert_equal, assert_array_equal,
     assert_almost_equal, assert_array_almost_equal, assert_raises,
@@ -346,6 +346,20 @@ class TestHistogram(object):
         self.do_precision(np.single, np.longdouble)
         self.do_precision(np.double, np.longdouble)
 
+    def test_histogram_bin_edges(self):
+        hist, e = histogram([1, 2, 3, 4], [1, 2])
+        edges = histogram_bin_edges([1, 2, 3, 4], [1, 2])
+        assert_array_equal(edges, e)
+
+        arr = np.array([0.,  0.,  0.,  1.,  2.,  3.,  3.,  4.,  5.])
+        hist, e = histogram(arr, bins=30, range=(-0.5, 5))
+        edges = histogram_bin_edges(arr, bins=30, range=(-0.5, 5))
+        assert_array_equal(edges, e)
+
+        hist, e = histogram(arr, bins='auto', range=(0, 1))
+        edges = histogram_bin_edges(arr, bins='auto', range=(0, 1))
+        assert_array_equal(edges, e)
+
 
 class TestHistogramOptimBinNums(object):
     """