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ift
NIFTy
Commits
6007131f
Commit
6007131f
authored
Jan 29, 2019
by
Reimar H Leike
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added docu to the checks
parent
ecedc71f
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nifty5/extra.py
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nifty5/extra.py
View file @
6007131f
...
...
@@ -74,25 +74,31 @@ def _check_linearity(op, domain_dtype, atol, rtol):
def
consistency_check
(
op
,
domain_dtype
=
np
.
float64
,
target_dtype
=
np
.
float64
,
atol
=
0
,
rtol
=
1e-7
):
"""Checks whether times(), adjoint_times(), inverse_times() and
"""
Checks an operator for algebraic consistency of its capabilities.
Checks whether times(), adjoint_times(), inverse_times() and
adjoint_inverse_times() (if in capability list) is implemented
consistently. Additionally, it checks whether the operator is linear
actually.
consistently. Additionally, it checks whether the operator is linear.
Parameters
----------
op : LinearOperator
Operator which shall be checked.
domain_dtype :
FIXME
domain_dtype :
dtype
The data type of the random vectors in the operator's domain. Default
is `np.float64`.
target_dtype :
FIXME
target_dtype :
dtype
The data type of the random vectors in the operator's target. Default
is `np.float64`.
atol : float
FIXME. Default is 0.
Absolute tolerance for the check. If rtol is specified,
then satisfying any tolerance will let the check pass.
Default: 0.
rtol : float
FIXME. Default is 0.
Relative tolerance for the check. If atol is specified,
then satisfying any tolerance will let the check pass.
Default: 0.
"""
if
not
isinstance
(
op
,
LinearOperator
):
raise
TypeError
(
'This test tests only linear operators.'
)
...
...
@@ -157,7 +163,28 @@ def _check_consistency(op, loc, tol, ntries, do_metric):
def
check_value_gradient_consistency
(
op
,
loc
,
tol
=
1e-8
,
ntries
=
100
):
"""FIXME"""
"""
Checks the gradient (jacobian) of an operator against its value.
Computes the gradient (jacobian) with finite differences and compares
it to the implemented gradient (jacobian).
Parameters
----------
op : Operator
Operator which shall be checked.
loc : Field or MultiField
An Field or MultiField instance which has the same domain
as op. The location at which the gradient is checked
atol : float
Absolute tolerance for the check. If rtol is specified,
then satisfying any tolerance will let the check pass.
Default: 0.
rtol : float
Relative tolerance for the check. If atol is specified,
then satisfying any tolerance will let the check pass.
Default: 0
"""
_check_consistency
(
op
,
loc
,
tol
,
ntries
,
False
)
...
...
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