New method is_zero

pyerrors/correlators.py

@@ -148,7 +148,7 @@ class Corr:
         if self.T % 2 != 0:
             raise Exception("Can not symmetrize odd T")
 
-        if not all([o.zero_within_error() for o in self.content[0]]):
+        if not all([o.is_zero_within_error() for o in self.content[0]]):
             warnings.warn("Correlator does not seem to be anti-symmetric around x0=0.", RuntimeWarning)
 
         newcontent = [self.content[0]]

pyerrors/pyerrors.py

@@ -341,9 +341,12 @@ class Obs:
                 for e_name in self.e_names:
                     print(e_name, ':', self.e_content[e_name])
 
-    def zero_within_error(self):
+    def is_zero_within_error(self):
         return np.abs(self.value) <= self.dvalue
 
+    def is_zero(self):
+        np.isclose(0.0, self.value) and all(np.allclose(0.0, delta) for delta in self.deltas.values())
+
     def plot_tauint(self, save=None):
         """Plot integrated autocorrelation time for each ensemble."""
         if not self.e_names:

tests/test_pyerrors.py

@@ -177,7 +177,7 @@ def test_utils():
     my_obs.print(0)
     my_obs.print(1)
     my_obs.print(2)
-    assert not my_obs.zero_within_error()
+    assert not my_obs.is_zero_within_error()
     my_obs.plot_tauint()
     my_obs.plot_rho()
     my_obs.plot_rep_dist()