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roots.py
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Sat, Jul 20, 16:14
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text/x-python
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Mon, Jul 22, 16:14 (2 d)
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R6746 RationalROMPy
roots.py
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# Copyright (C) 2018-2020 by the RROMPy authors
#
# This file is part of RROMPy.
#
# RROMPy is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# RROMPy 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with RROMPy. If not, see <http://www.gnu.org/licenses/>.
#
from
numpy
import
polynomial
as
po
from
.base
import
polybases
from
.marginalize
import
polymarginalize
from
rrompy.utilities.base.types
import
Np1D
,
Np2D
from
rrompy.utilities.base
import
freepar
as
fp
from
rrompy.utilities.exception_manager
import
RROMPyException
__all__
=
[
'polyroots'
]
def
polyroots
(
c
:
Np2D
,
basis
:
str
,
marginalVals
:
Np1D
=
[
fp
])
->
Np1D
:
if
basis
.
upper
()
not
in
polybases
:
raise
RROMPyException
(
"Polynomial basis not recognized."
)
rootsbase
=
{
"CHEBYSHEV"
:
po
.
chebyshev
.
chebroots
,
"LEGENDRE"
:
po
.
legendre
.
legroots
,
"MONOMIAL"
:
po
.
polynomial
.
polyroots
}[
basis
.
upper
()]
return
rootsbase
(
polymarginalize
(
c
,
basis
,
marginalVals
,
1
))
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