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ift
NIFTy
Commits
7bb26999
Commit
7bb26999
authored
Jun 24, 2019
by
Martin Reinecke
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more tests, cleanups
parent
15db8450
Pipeline
#51040
passed with stages
in 17 minutes and 24 seconds
Changes
2
Pipelines
1
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Showing
2 changed files
with
40 additions
and
11 deletions
+40
-11
nifty5/library/gridder.py
nifty5/library/gridder.py
+8
-8
test/test_operators/test_nft.py
test/test_operators/test_nft.py
+32
-3
No files found.
nifty5/library/gridder.py
View file @
7bb26999
...
...
@@ -36,23 +36,23 @@ class GridderMaker(object):
raise
ValueError
(
"second dimension of uv must have length 2"
)
dstx
,
dsty
=
dirty_domain
[
0
].
distances
# wasteful hack to adjust to shape required by nifty_gridder
uvw
=
np
.
empty
((
uv
.
shape
[
0
],
3
),
dtype
=
np
.
float64
)
uvw
[:,
0
:
2
]
=
uv
uvw
[:,
2
]
=
0.
uvw
=
np
.
empty
((
uv
.
shape
[
0
],
3
),
dtype
=
np
.
float64
)
uvw
[:,
0
:
2
]
=
uv
uvw
[:,
2
]
=
0.
# Scale uv such that 0<uv<=1 which is assumed by nifty_gridder
uvw
[:,
0
]
=
uvw
[:,
0
]
*
dstx
uvw
[:,
1
]
=
uvw
[:,
1
]
*
dsty
uvw
[:,
0
]
=
uvw
[:,
0
]
*
dstx
uvw
[:,
1
]
=
uvw
[:,
1
]
*
dsty
speedOfLight
=
299792458.
bl
=
nifty_gridder
.
Baselines
(
uvw
,
np
.
array
([
speedOfLight
]))
nxdirty
,
nydirty
=
dirty_domain
.
shape
nxd
,
nyd
=
dirty_domain
.
shape
gconf
=
nifty_gridder
.
GridderConfig
(
nxdirty
,
nydirty
,
eps
,
1.
,
1.
)
nu
,
nv
=
gconf
.
Nu
(),
gconf
.
Nv
()
self
.
_idx
=
nifty_gridder
.
getIndices
(
bl
,
gconf
,
np
.
zeros
((
uv
.
shape
[
0
],
1
),
dtype
=
np
.
bool
))
bl
,
gconf
,
np
.
zeros
((
uv
.
shape
[
0
],
1
),
dtype
=
np
.
bool
))
self
.
_bl
=
bl
grid_domain
=
RGSpace
([
nu
,
nv
],
distances
=
[
1
,
1
],
harmonic
=
False
)
du
,
dv
=
1.
/
(
nu
*
dstx
),
1.
/
(
nv
*
dsty
)
grid_domain
=
RGSpace
([
nu
,
nv
],
distances
=
[
du
,
dv
],
harmonic
=
True
)
self
.
_rest
=
_RestOperator
(
dirty_domain
,
grid_domain
,
gconf
)
self
.
_gridder
=
RadioGridder
(
grid_domain
,
bl
,
gconf
,
self
.
_idx
)
...
...
test/test_operators/test_nft.py
View file @
7bb26999
...
...
@@ -41,8 +41,8 @@ def test_gridding(nu, nv, N, eps):
# Nifty
dom
=
ift
.
RGSpace
((
nu
,
nv
),
distances
=
(
0.2
,
1.12
))
dstx
,
dsty
=
dom
.
distances
uv
[:,
0
]
=
uv
[:,
0
]
/
dstx
uv
[:,
1
]
=
uv
[:,
1
]
/
dsty
uv
[:,
0
]
=
uv
[:,
0
]
/
dstx
uv
[:,
1
]
=
uv
[:,
1
]
/
dsty
GM
=
ift
.
GridderMaker
(
dom
,
uv
=
uv
,
eps
=
eps
)
vis2
=
ift
.
from_global_data
(
ift
.
UnstructuredDomain
(
vis
.
shape
),
vis
)
...
...
@@ -53,10 +53,39 @@ def test_gridding(nu, nv, N, eps):
*
[
-
ss
/
2
+
np
.
arange
(
ss
)
for
ss
in
[
nu
,
nv
]],
indexing
=
'ij'
)
dft
=
pynu
*
0.
for
i
in
range
(
N
):
dft
+=
(
vis
[
i
]
*
np
.
exp
(
2j
*
np
.
pi
*
(
x
*
uv
[
i
,
0
]
*
dstx
+
y
*
uv
[
i
,
1
]
*
dsty
))).
real
dft
+=
(
vis
[
i
]
*
np
.
exp
(
2j
*
np
.
pi
*
(
x
*
uv
[
i
,
0
]
*
dstx
+
y
*
uv
[
i
,
1
]
*
dsty
))).
real
assert_
(
_l2error
(
dft
,
pynu
)
<
eps
)
def
test_cartesian
():
nx
,
ny
=
2
,
6
dstx
,
dsty
=
0.3
,
0.2
dom
=
ift
.
RGSpace
((
nx
,
ny
),
(
dstx
,
dsty
))
kx
=
np
.
fft
.
fftfreq
(
nx
,
dstx
)
ky
=
np
.
fft
.
fftfreq
(
ny
,
dsty
)
uu
,
vv
=
np
.
meshgrid
(
kx
,
ky
)
tmp
=
np
.
vstack
([
uu
[
None
,
:],
vv
[
None
,
:]])
uv
=
np
.
transpose
(
tmp
,
(
2
,
1
,
0
)).
reshape
(
-
1
,
2
)
GM
=
ift
.
GridderMaker
(
dom
,
uv
=
uv
)
op
=
GM
.
getFull
().
adjoint
fld
=
ift
.
from_random
(
'normal'
,
dom
)
arr
=
fld
.
to_global_data
()
fld2
=
ift
.
from_global_data
(
dom
,
np
.
roll
(
arr
,
(
nx
//
2
,
ny
//
2
),
axis
=
(
0
,
1
)))
res
=
op
(
fld2
).
to_global_data
().
reshape
(
nx
,
ny
)
fft
=
ift
.
FFTOperator
(
dom
.
get_default_codomain
(),
target
=
dom
).
adjoint
vol
=
ift
.
full
(
dom
,
1.
).
integrate
()
res1
=
fft
(
fld
).
to_global_data
()
# FIXME: we don't understand the conjugate() yet
np
.
testing
.
assert_allclose
(
res
,
res1
.
conjugate
()
*
vol
)
@
pmp
(
'eps'
,
[
1e-2
,
1e-6
,
2e-13
])
@
pmp
(
'nu'
,
[
12
,
128
])
@
pmp
(
'nv'
,
[
4
,
12
,
128
])
...
...
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