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-rw-r--r--numpy/lib/histograms.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/numpy/lib/histograms.py b/numpy/lib/histograms.py
index 7af67a7ee..b6909bc1d 100644
--- a/numpy/lib/histograms.py
+++ b/numpy/lib/histograms.py
@@ -562,7 +562,8 @@ def histogram_bin_edges(a, bins=10, range=None, weights=None):
below, :math:`h` is the binwidth and :math:`n_h` is the number of
bins. All estimators that compute bin counts are recast to bin width
using the `ptp` of the data. The final bin count is obtained from
- ``np.round(np.ceil(range / h))``.
+ ``np.round(np.ceil(range / h))``. The final bin width is often less
+ than what is returned by the estimators below.
'auto' (maximum of the 'sturges' and 'fd' estimators)
A compromise to get a good value. For small datasets the Sturges