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-rw-r--r--numpy/add_newdocs.py7
1 files changed, 6 insertions, 1 deletions
diff --git a/numpy/add_newdocs.py b/numpy/add_newdocs.py
index 14cd2a890..baf5285f0 100644
--- a/numpy/add_newdocs.py
+++ b/numpy/add_newdocs.py
@@ -860,13 +860,18 @@ add_newdoc('numpy.core.multiarray', 'arange',
`range <http://docs.python.org/lib/built-in-funcs.html>`_ function,
but returns a ndarray rather than a list.
+ When using a non-integer step, such as 0.1, the results will often not
+ be consistent. It is better to use ``linspace`` for these cases.
+
Parameters
----------
start : number, optional
Start of interval. The interval includes this value. The default
start value is 0.
stop : number
- End of interval. The interval does not include this value.
+ End of interval. The interval does not include this value, except
+ in some cases where `step` is not an integer and floating point
+ round-off affects the length of `out`.
step : number, optional
Spacing between values. For any output `out`, this is the distance
between two adjacent values, ``out[i+1] - out[i]``. The default