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refactor: redundant lines in _covariance_element removed.

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Fabian Joswig 2022-03-01 14:35:38 +00:00
parent 74b0f77c2d
commit c28d6131b1
1 changed files with 3 additions and 15 deletions
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18
pyerrors/obs.py
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@ -1365,7 +1365,7 @@ def covariance(obs, correlation=False, **kwargs):
def _covariance_element(obs1, obs2):
"""Estimates the covariance of two Obs objects based on fixed window sizes passed to the function."""
"""Estimates the uncorrelated covariance of two Obs objects."""
def expand_deltas(deltas, idx, shape, new_idx):
"""Expand deltas defined on idx to a contiguous range [new_idx[0], new_idx[-1]].
@ -1410,25 +1410,20 @@ def _covariance_element(obs1, obs2):
raise Exception('The gamma method has to be applied to both Obs first.')
dvalue = 0
w_max = 1
e_gamma = {}
e_dvalue = {}
e_n_tauint = {}
e_rho = {}
for e_name in obs1.mc_names:
if e_name not in obs2.mc_names:
continue
window = 0
idl_d = {}
for r_name in obs1.e_content[e_name]:
if r_name not in obs2.e_content[e_name]:
continue
idl_d[r_name] = _merge_idx([obs1.idl[r_name], obs2.idl[r_name]])
w_max = window + 1
e_gamma[e_name] = np.zeros(w_max)
for r_name in obs1.e_content[e_name]:
@ -1451,15 +1446,8 @@ def _covariance_element(obs1, obs2):
e_N += np.sum(np.ones_like(idl_d[r_name]))
e_gamma[e_name] /= gamma_div[:w_max]
e_rho[e_name] = e_gamma[e_name][:w_max] / e_gamma[e_name][0]
e_n_tauint[e_name] = np.cumsum(np.concatenate(([0.5], e_rho[e_name][1:])))
# Make sure no entry of tauint is smaller than 0.5
e_n_tauint[e_name][e_n_tauint[e_name] < 0.5] = 0.5 + np.finfo(np.float64).eps
# Bias correction hep-lat/0306017 eq. (49)
e_dvalue[e_name] = 2 * (e_n_tauint[e_name][window]) * (1 + (2 * window + 1) / e_N) * e_gamma[e_name][0] / e_N
dvalue += e_dvalue[e_name]
dvalue += (1 + 1 / e_N) * e_gamma[e_name][0] / e_N
for e_name in obs1.cov_names: