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* The sign of the scalar prefactor should not enter the uncertainty

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(err) field!
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wirawan
2011-03-10 20:17:55 +00:00
parent 2a30c20a79
commit 6181d5588d
1 changed files with 5 additions and 5 deletions
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10
math/stats/errorbar.py
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@@ -1,4 +1,4 @@
# $Id: errorbar.py,v 1.2 2010-12-01 17:11:46 wirawan Exp $ # $Id: errorbar.py,v 1.3 2011-03-10 20:17:55 wirawan Exp $
# #
# Module wpylib.math.stats.errorbar # Module wpylib.math.stats.errorbar
# Errorbar text handling for Python # Errorbar text handling for Python
@@ -185,20 +185,20 @@ class errorbar(object):
# Some algebraic operations with scalars are defined here: # Some algebraic operations with scalars are defined here:
def __mul__(self, y): def __mul__(self, y):
"""Scales by a scalar value.""" """Scales by a scalar value."""
return self.__class__(self.val*y, self.err*y, ebproc=self.ebproc) return self.__class__(self.val*y, self.err*abs(y), ebproc=self.ebproc)
__rmul__ = __mul__ __rmul__ = __mul__
def __imul__(self, y): def __imul__(self, y):
"""Scales itself by a scalar value.""" """Scales itself by a scalar value."""
self.val *= y self.val *= y
self.err *= y self.err *= abs(y)
self.ebupdate() self.ebupdate()
def __div__(self, y): def __div__(self, y):
"""Divides by a scalar value.""" """Divides by a scalar value."""
return self.__class__(self.val/y, self.err/y, ebproc=self.ebproc) return self.__class__(self.val/y, self.err/abs(y), ebproc=self.ebproc)
def __idiv__(self, y): def __idiv__(self, y):
"""Scales itself by a scalar value (division).""" """Scales itself by a scalar value (division)."""
self.val /= y self.val /= y
self.err /= y self.err /= abs(y)
self.ebupdate() self.ebupdate()
def __add__(self, y): def __add__(self, y):