Commit 04a93f9e authored by Philipp Arras's avatar Philipp Arras

Add ValueInserter

parent 203d3975
......@@ -46,6 +46,7 @@ from .operators.outer_product_operator import OuterProduct
from .operators.simple_linear_operators import (
VdotOperator, ConjugationOperator, Realizer,
FieldAdapter, ducktape, GeometryRemover, NullOperator)
from .operators.value_inserter import ValueInserter
from .operators.energy_operators import (
EnergyOperator, GaussianEnergy, PoissonianEnergy, InverseGammaLikelihood,
BernoulliEnergy, Hamiltonian, SampledKullbachLeiblerDivergence)
......
# 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) 2013-2019 Max-Planck-Society
#
# NIFTy is being developed at the Max-Planck-Institut fuer Astrophysik.
import numpy as np
from ..domain_tuple import DomainTuple
from ..domains.unstructured_domain import UnstructuredDomain
from ..field import Field
from ..sugar import makeDomain
from .linear_operator import LinearOperator
class ValueInserter(LinearOperator):
"""Inserts one value into a field which is zero otherwise.
Parameters
----------
target : Domain, tuple of Domain or DomainTuple
index : iterable of int
The index of the target into which the value of the domain shall be
inserted.
"""
def __init__(self, target, index):
self._domain = makeDomain(UnstructuredDomain(1))
self._target = DomainTuple.make(target)
index = tuple(index)
if not all([isinstance(n, int) and n>=0 and n<self.target.shape[i] for i, n in enumerate(index)]):
raise TypeError
self._index = index
self._capability = self.TIMES | self.ADJOINT_TIMES
# Check whether index is in bounds
np.empty(self.target.shape)[self._index]
def apply(self, x, mode):
self._check_input(x, mode)
x = x.to_global_data()
if mode == self.TIMES:
res = np.zeros(self.target.shape, dtype=x.dtype)
res[self._index] = x
else:
res = np.full((1,), x[self._index], dtype=x.dtype)
return Field.from_global_data(self._tgt(mode), res)
......@@ -15,6 +15,8 @@
#
# NIFTy is being developed at the Max-Planck-Institut fuer Astrophysik.
from random import randint
import numpy as np
import pytest
......@@ -264,3 +266,10 @@ def testOuter(fdomain, domain):
f = ift.from_random('normal', fdomain)
op = ift.OuterProduct(f, domain)
ift.extra.consistency_check(op)
@pmp('sp', _h_spaces + _p_spaces + _pow_spaces)
def testValueInserter(sp):
ind = tuple([randint(0, ss-1) for ss in sp.shape])
op = ift.ValueInserter(sp, ind)
ift.extra.consistency_check(op)
# 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) 2013-2019 Max-Planck-Society
#
# NIFTy is being developed at the Max-Planck-Institut fuer Astrophysik.
from random import randint
import numpy as np
import pytest
from numpy.testing import assert_
import nifty5 as ift
@pytest.mark.parametrize('sp', [
ift.RGSpace(4),
ift.PowerSpace(ift.RGSpace((4, 4), harmonic=True)),
ift.LMSpace(5),
ift.HPSpace(4),
ift.GLSpace(4)
])
def test_value_inserter(sp):
ind = tuple([randint(0, ss - 1) for ss in sp.shape])
op = ift.ValueInserter(sp, ind)
f = ift.from_random('normal', ift.UnstructuredDomain((1,)))
inp = f.to_global_data()
ret = op(f).to_global_data()
assert_(ret[ind] == inp)
assert_(np.sum(ret) == inp)
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment