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ift
NIFTy
Commits
841b7ecb
Commit
841b7ecb
authored
Jul 09, 2017
by
Theo Steininger
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Fixed bug in _spec_to_rescaler and added stochastic tests for power_analyze/power_synthesize
parent
41a5faf9
Pipeline
#14526
passed with stages
in 13 minutes and 2 seconds
Changes
2
Pipelines
1
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2 changed files
with
46 additions
and
4 deletions
+46
-4
nifty/field.py
nifty/field.py
+5
-2
test/test_field.py
test/test_field.py
+41
-2
No files found.
nifty/field.py
View file @
841b7ecb
...
...
@@ -672,8 +672,11 @@ class Field(Loggable, Versionable, object):
# Do this for every 'pindex-slice' in parallel using the 'slice(None)'s
local_pindex
=
pindex
.
get_local_data
(
copy
=
False
)
local_blow_up
=
[
slice
(
None
)]
*
len
(
self
.
shape
)
local_blow_up
[
self
.
domain_axes
[
power_space_index
][
0
]]
=
local_pindex
local_blow_up
=
[
slice
(
None
)]
*
len
(
spec
.
shape
)
# it is important to count from behind, since spec potentially grows
# with every iteration
index
=
self
.
domain_axes
[
power_space_index
][
0
]
-
len
(
self
.
shape
)
local_blow_up
[
index
]
=
local_pindex
# here, the power_spectrum is distributed into the new shape
local_rescaler
=
spec
[
local_blow_up
]
return
local_rescaler
...
...
test/test_field.py
View file @
841b7ecb
...
...
@@ -20,12 +20,15 @@ import unittest
import
numpy
as
np
from
numpy.testing
import
assert_
,
\
assert_almost_equal
assert_almost_equal
,
\
assert_allclose
from
itertools
import
product
from
nifty
import
Field
,
\
RGSpace
RGSpace
,
\
LMSpace
,
\
PowerSpace
from
d2o
import
distributed_data_object
...
...
@@ -80,3 +83,39 @@ class Test_Functionality(unittest.TestCase):
assert_almost_equal
(
a1
.
get_full_data
(),
a2
.
get_full_data
())
assert_almost_equal
(
h1
.
get_full_data
(),
h3
.
get_full_data
())
assert_almost_equal
(
a1
.
get_full_data
(),
a3
.
get_full_data
())
@
expand
(
product
([
RGSpace
((
8
,),
harmonic
=
True
,
zerocenter
=
False
),
RGSpace
((
8
,
8
),
harmonic
=
True
,
distances
=
0.123
,
zerocenter
=
True
)],
[
RGSpace
((
8
,),
harmonic
=
True
,
zerocenter
=
False
),
LMSpace
(
12
)]))
def
test_power_synthesize_analyze
(
self
,
space1
,
space2
):
p1
=
PowerSpace
(
space1
)
spec1
=
lambda
k
:
42
/
(
1
+
k
)
**
2
fp1
=
Field
(
p1
,
val
=
spec1
)
p2
=
PowerSpace
(
space2
)
spec2
=
lambda
k
:
42
/
(
1
+
k
)
**
3
fp2
=
Field
(
p2
,
val
=
spec2
)
outer
=
np
.
outer
(
fp1
.
val
.
get_full_data
(),
fp2
.
val
.
get_full_data
())
fp
=
Field
((
p1
,
p2
),
val
=
outer
)
samples
=
1000
ps1
=
0.
ps2
=
0.
for
ii
in
xrange
(
samples
):
sk
=
fp
.
power_synthesize
(
spaces
=
(
0
,
1
),
real_signal
=
True
)
sp
=
sk
.
power_analyze
(
spaces
=
(
0
,
1
),
keep_phase_information
=
False
)
ps1
+=
sp
.
sum
(
spaces
=
1
)
/
fp2
.
sum
()
ps2
+=
sp
.
sum
(
spaces
=
0
)
/
fp1
.
sum
()
assert_allclose
(
ps1
.
val
.
get_full_data
()
/
samples
,
fp1
.
val
.
get_full_data
(),
rtol
=
0.1
)
assert_allclose
(
ps2
.
val
.
get_full_data
()
/
samples
,
fp2
.
val
.
get_full_data
(),
rtol
=
0.1
)
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