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ift
NIFTy
Commits
78005d9f
Commit
78005d9f
authored
Jul 10, 2018
by
Martin Reinecke
Browse files
add NullOperator
parent
1f9e0de6
Changes
3
Hide whitespace changes
Inline
Side-by-side
nifty5/models/constant.py
View file @
78005d9f
...
...
@@ -18,6 +18,7 @@
from
__future__
import
absolute_import
,
division
,
print_function
from
..compat
import
*
from
..operators.null_operator
import
NullOperator
from
.model
import
Model
...
...
@@ -43,7 +44,7 @@ class Constant(Model):
self
.
_constant
=
constant
self
.
_value
=
self
.
_constant
self
.
_jacobian
=
0.
self
.
_jacobian
=
NullOperator
(
position
.
domain
,
constand
.
domain
)
def
at
(
self
,
position
):
return
self
.
__class__
(
position
,
self
.
_constant
)
nifty5/multi/multi_field.py
View file @
78005d9f
...
...
@@ -30,7 +30,7 @@ class MultiField(object):
Parameters
----------
domain: MultiDomain
val: tuple
of Field
s
val: tuple
containing Field or None entrie
s
"""
if
not
isinstance
(
domain
,
MultiDomain
):
raise
TypeError
(
"domain must be of type MultiDomain"
)
...
...
@@ -38,12 +38,12 @@ class MultiField(object):
raise
TypeError
(
"val must be a tuple"
)
if
len
(
val
)
!=
len
(
domain
):
raise
ValueError
(
"length mismatch"
)
for
i
,
v
in
enumerate
(
val
):
for
d
,
v
in
zip
(
domain
.
_domains
,
val
):
if
isinstance
(
v
,
Field
):
if
v
.
_domain
is
not
d
omain
.
_domains
[
i
]
:
if
v
.
_domain
is
not
d
:
raise
ValueError
(
"domain mismatch"
)
elif
v
is
not
None
:
raise
TypeError
(
"bad entry in val"
)
raise
TypeError
(
"bad entry in val
(must be Field or None)
"
)
self
.
_domain
=
domain
self
.
_val
=
val
...
...
nifty5/operators/null_operator.py
0 → 100644
View file @
78005d9f
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# Copyright(C) 2013-2018 Max-Planck-Society
#
# NIFTy is being developed at the Max-Planck-Institut fuer Astrophysik
# and financially supported by the Studienstiftung des deutschen Volkes.
from
__future__
import
absolute_import
,
division
,
print_function
from
..compat
import
*
from
..domain_tuple
import
DomainTuple
from
..field
import
Field
from
..multi.multi_field
import
MultiField
from
..operators.linear_operator
import
LinearOperator
class
NullOperator
(
LinearOperator
):
"""Operator corresponding to a matrix of all zeros.
Parameters
----------
domain : DomainTuple or MultiDomain
input domain
target : DomainTuple or MultiDomain
output domain
"""
def
__init__
(
self
,
domain
,
target
):
from
..sugar
import
makeDomain
self
.
_domain
=
makeDomain
(
domain
)
self
.
_target
=
makeDomain
(
target
)
@
staticmethod
def
_nullfield
(
dom
):
if
isinstance
(
dom
,
DomainTuple
):
return
Field
.
full
(
self
.
_target
,
0
)
else
:
return
MultiField
(
dom
,
(
None
,)
*
len
(
dom
))
def
apply
(
self
,
x
,
mode
):
self
.
_check_input
(
x
,
mode
)
if
mode
==
self
.
TIMES
:
return
self
.
_nullfield
(
self
.
_target
)
return
self
.
_nullfield
(
self
.
_domain
)
@
property
def
domain
(
self
):
return
self
.
_domain
@
property
def
target
(
self
):
return
self
.
_target
@
property
def
capability
(
self
):
return
self
.
TIMES
|
self
.
ADJOINT_TIMES
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