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matrix_solver.py
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Created
Tue, Apr 30, 15:36
Size
927 B
Mime Type
text/x-python
Expires
Thu, May 2, 15:36 (2 d)
Engine
blob
Format
Raw Data
Handle
17361040
Attached To
R6746 RationalROMPy
matrix_solver.py
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import
numpy
as
np
import
scipy.sparse
as
sp
from
rrompy.hfengines.base
import
LinearAffineEngine
,
NumpyEngineBase
test
=
2
N
=
100
verb
=
0
class
MatrixEngineBase
(
LinearAffineEngine
,
NumpyEngineBase
):
pass
solver
=
MatrixEngineBase
(
verbosity
=
verb
)
solver
.
npar
=
1
solver
.
nAs
=
2
mu
=
5.001
if
test
==
1
:
solver
.
As
=
[
sp
.
spdiags
([
np
.
arange
(
1
,
1
+
N
)],
[
0
],
N
,
N
),
-
sp
.
eye
(
N
)]
elif
test
==
2
:
solver
.
setSolver
(
"SOLVE"
)
fftB
=
np
.
fft
.
fft
(
np
.
eye
(
N
))
*
N
**-.
5
solver
.
As
=
[
fftB
.
dot
(
np
.
multiply
(
np
.
arange
(
1
,
1
+
N
),
fftB
.
conj
())
.
T
),
-
np
.
eye
(
N
)]
solver
.
nbs
=
1
solver
.
bs
=
[
np
.
random
.
randn
(
N
)
+
1.j
*
np
.
random
.
randn
(
N
)]
solver
.
_affinePoly
=
True
solver
.
thAs
=
solver
.
getMonomialWeights
(
solver
.
nAs
)
solver
.
thbs
=
solver
.
getMonomialWeights
(
solver
.
nbs
)
uh
=
solver
.
solve
(
mu
)[
0
]
print
(
solver
.
norm
(
uh
))
solver
.
plot
(
uh
)
solver
.
plot
(
solver
.
residual
(
mu
,
uh
)[
0
],
name
=
'res'
)
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