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Fixed reciprocal unit prefix #29

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Merged
ppinard merged 2 commits into from
Apr 11, 2020
Merged

Fixed reciprocal unit prefix #29

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2ebab20
Fixed reciprocal unit prefix
din14970 Apr 9, 2020
9828c03
updated SILengthReciprocalDimension tests
din14970 Apr 9, 2020
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2 changes: 1 addition & 1 deletion matplotlib_scalebar/dimension.py
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Original file line number Diff line number Diff line change
Expand Up @@ -121,7 +121,7 @@ def __init__(self):
latexrepr = "{0}m$^{{-1}}$".format(prefix)
if prefix == "\u00b5" or prefix == "u":
latexrepr = _LATEX_MU + "m$^{-1}$"
self.add_units("1/{0}m".format(prefix), factor, latexrepr)
self.add_units("1/{0}m".format(prefix), 1/factor, latexrepr)


class ImperialLengthDimension(_Dimension):
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6 changes: 3 additions & 3 deletions matplotlib_scalebar/test_dimension.py
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Expand Up @@ -118,13 +118,13 @@ def tearDown(self):

def testcalculate_preferred_cm(self):
value, units = self.dim.calculate_preferred(0.02, "1/m")
self.assertAlmostEqual(2.0, value, 2)
self.assertEqual("1/cm", units)
self.assertAlmostEqual(20.0, value, 2)
self.assertEqual("1/km", units)

def testcalculate_preferred_mm1(self):
value, units = self.dim.calculate_preferred(0.002, "1/m")
self.assertAlmostEqual(2.0, value, 2)
self.assertEqual("1/mm", units)
self.assertEqual("1/km", units)

def testto_latex_cm(self):
self.assertEqual("cm$^{-1}$", self.dim.to_latex("1/cm"))
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