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test02.py
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Created
Mon, Jul 22, 13:25
Size
555 B
Mime Type
text/x-python
Expires
Wed, Jul 24, 13:25 (1 d, 23 h)
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blob
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Raw Data
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19219714
Attached To
rPNBODY pNbody
test02.py
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from
pNbody
import
*
import
time
import
treelib
import
Ptools
as
pt
ErrTolTheta
=
0.8
eps
=
0.1
# open a model
nb
=
Nbody
(
"../../examples/snap.dat"
,
ftype
=
'gadget'
)
#nb = nb.selectc(nb.rxyz()<2)
# create a tree object
MyTree
=
treelib
.
Tree
(
npart
=
array
(
nb
.
npart
),
pos
=
nb
.
pos
,
vel
=
nb
.
vel
,
mass
=
nb
.
mass
,
ErrTolTheta
=
ErrTolTheta
)
R
=
arange
(
-
20
,
20
,
0.1
)
print
len
(
R
)
pos
=
concatenate
((
R
,
zeros
(
len
(
R
)),
zeros
(
len
(
R
))))
pos
.
shape
=
(
3
,
len
(
R
))
pos
=
transpose
(
pos
)
pos
=
pos
.
astype
(
float32
)
acc
=
MyTree
.
Acceleration
(
pos
,
eps
)
pt
.
plot
(
R
,
acc
[:,
0
])
pt
.
show
()
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