diff --git a/lib/matplotlib/tests/test_ticker.py b/lib/matplotlib/tests/test_ticker.py
index 94f66e8060e7..b61345d37086 100644
--- a/lib/matplotlib/tests/test_ticker.py
+++ b/lib/matplotlib/tests/test_ticker.py
@@ -450,6 +450,26 @@ def test_percentformatter():
yield (_percent_format_helper,) + case
+def test_EngFormatter_formatting():
+ """
+ Create two instances of EngFormatter with default parameters, with and
+ without a unit string ('s' for seconds). Test the formatting in some cases,
+ especially the case when no SI prefix is present, for values in [1, 1000).
+
+ Should not raise exceptions.
+ """
+ unitless = mticker.EngFormatter()
+ nose.tools.assert_equal(unitless(0.1), u'100 m')
+ nose.tools.assert_equal(unitless(1), u'1')
+ nose.tools.assert_equal(unitless(999.9), u'999.9')
+ nose.tools.assert_equal(unitless(1001), u'1.001 k')
+
+ with_unit = mticker.EngFormatter(unit=u's')
+ nose.tools.assert_equal(with_unit(0.1), u'100 ms')
+ nose.tools.assert_equal(with_unit(1), u'1 s')
+ nose.tools.assert_equal(with_unit(999.9), u'999.9 s')
+ nose.tools.assert_equal(with_unit(1001), u'1.001 ks')
+
if __name__ == '__main__':
import nose
nose.runmodule(argv=['-s', '--with-doctest'], exit=False)
diff --git a/lib/matplotlib/ticker.py b/lib/matplotlib/ticker.py
index 782187cd09d1..b878589ed051 100644
--- a/lib/matplotlib/ticker.py
+++ b/lib/matplotlib/ticker.py
@@ -1033,7 +1033,7 @@ class EngFormatter(Formatter):
suitable for use with single-letter representations of powers of
1000. For example, 'Hz' or 'm'.
- `places` is the percision with which to display the number,
+ `places` is the precision with which to display the number,
specified in digits after the decimal point (there will be between
one and three digits before the decimal point).
"""
@@ -1113,7 +1113,11 @@ def format_eng(self, num):
formatted = format_str % (mant, prefix)
- return formatted.strip()
+ formatted = formatted.strip()
+ if (self.unit != "") and (prefix == self.ENG_PREFIXES[0]):
+ formatted = formatted + " "
+
+ return formatted
class PercentFormatter(Formatter):
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