本文整理汇总了Python中sympy.polys.polyclasses.DMP.as_expr方法的典型用法代码示例。如果您正苦于以下问题：Python DMP.as_expr方法的具体用法？Python DMP.as_expr怎么用？Python DMP.as_expr使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类sympy.polys.polyclasses.DMP的用法示例。
在下文中一共展示了DMP.as_expr方法的14个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: gegenbauer_poly
# 需要导入模块: from sympy.polys.polyclasses import DMP [as 别名]
# 或者: from sympy.polys.polyclasses.DMP import as_expr [as 别名]
def gegenbauer_poly(n, a, x=None, polys=False):
"""Generates Gegenbauer polynomial of degree `n` in `x`.
Parameters
==========
n : int
`n` decides the degree of polynomial
x : optional
a
Decides minimal domain for the list of
coefficients.
polys : bool, optional
``polys=True`` returns an expression, otherwise
(default) returns an expression.
"""
if n < 0:
raise ValueError(
"can't generate Gegenbauer polynomial of degree %s" % n)
K, a = construct_domain(a, field=True)
poly = DMP(dup_gegenbauer(int(n), a, K), K)
if x is not None:
poly = Poly.new(poly, x)
else:
poly = PurePoly.new(poly, Dummy('x'))
return poly if polys else poly.as_expr()示例2: jacobi_poly
# 需要导入模块: from sympy.polys.polyclasses import DMP [as 别名]
# 或者: from sympy.polys.polyclasses.DMP import as_expr [as 别名]
def jacobi_poly(n, a, b, x=None, polys=False):
"""Generates Jacobi polynomial of degree `n` in `x`.
Parameters
==========
n : int
`n` decides the degree of polynomial
a
Lower limit of minimal domain for the list of
coefficients.
b
Upper limit of minimal domain for the list of
coefficients.
x : optional
polys : bool, optional
``polys=True`` returns an expression, otherwise
(default) returns an expression.
"""
if n < 0:
raise ValueError("can't generate Jacobi polynomial of degree %s" % n)
K, v = construct_domain([a, b], field=True)
poly = DMP(dup_jacobi(int(n), v[0], v[1], K), K)
if x is not None:
poly = Poly.new(poly, x)
else:
poly = PurePoly.new(poly, Dummy('x'))
return poly if polys else poly.as_expr()示例3: laguerre_poly
# 需要导入模块: from sympy.polys.polyclasses import DMP [as 别名]
# 或者: from sympy.polys.polyclasses.DMP import as_expr [as 别名]
def laguerre_poly(n, x=None, alpha=None, polys=False):
"""Generates Laguerre polynomial of degree `n` in `x`.
Parameters
==========
n : int
`n` decides the degree of polynomial
x : optional
alpha
Decides minimal domain for the list
of coefficients.
polys : bool, optional
``polys=True`` returns an expression, otherwise
(default) returns an expression.
"""
if n < 0:
raise ValueError("can't generate Laguerre polynomial of degree %s" % n)
if alpha is not None:
K, alpha = construct_domain(
alpha, field=True) # XXX: ground_field=True
else:
K, alpha = QQ, QQ(0)
poly = DMP(dup_laguerre(int(n), alpha, K), K)
if x is not None:
poly = Poly.new(poly, x)
else:
poly = PurePoly.new(poly, Dummy('x'))
return poly if polys else poly.as_expr()示例4: chebyshevu_poly
# 需要导入模块: from sympy.polys.polyclasses import DMP [as 别名]
# 或者: from sympy.polys.polyclasses.DMP import as_expr [as 别名]
def chebyshevu_poly(n, x=None, polys=False):
"""Generates Chebyshev polynomial of the second kind of degree `n` in `x`.
Parameters
==========
n : int
`n` decides the degree of polynomial
x : optional
polys : bool, optional
``polys=True`` returns an expression, otherwise
(default) returns an expression.
"""
if n < 0:
raise ValueError(
"can't generate 2nd kind Chebyshev polynomial of degree %s" % n)
poly = DMP(dup_chebyshevu(int(n), ZZ), ZZ)
if x is not None:
poly = Poly.new(poly, x)
else:
poly = PurePoly.new(poly, Dummy('x'))
return poly if polys else poly.as_expr()示例5: spherical_bessel_fn
# 需要导入模块: from sympy.polys.polyclasses import DMP [as 别名]
# 或者: from sympy.polys.polyclasses.DMP import as_expr [as 别名]
def spherical_bessel_fn(n, x=None, polys=False):
"""
Coefficients for the spherical Bessel functions.
Those are only needed in the jn() function.
The coefficients are calculated from:
fn(0, z) = 1/z
fn(1, z) = 1/z**2
fn(n-1, z) + fn(n+1, z) == (2*n+1)/z * fn(n, z)
Parameters
==========
n : int
`n` decides the degree of polynomial
x : optional
polys : bool, optional
``polys=True`` returns an expression, otherwise
(default) returns an expression.
Examples
========
>>> from sympy.polys.orthopolys import spherical_bessel_fn as fn
>>> from sympy import Symbol
>>> z = Symbol("z")
>>> fn(1, z)
z**(-2)
>>> fn(2, z)
-1/z + 3/z**3
>>> fn(3, z)
-6/z**2 + 15/z**4
>>> fn(4, z)
1/z - 45/z**3 + 105/z**5
"""
if n < 0:
dup = dup_spherical_bessel_fn_minus(-int(n), ZZ)
else:
dup = dup_spherical_bessel_fn(int(n), ZZ)
poly = DMP(dup, ZZ)
if x is not None:
poly = Poly.new(poly, 1/x)
else:
poly = PurePoly.new(poly, 1/Dummy('x'))
return poly if polys else poly.as_expr()示例6: legendre_poly
# 需要导入模块: from sympy.polys.polyclasses import DMP [as 别名]
# 或者: from sympy.polys.polyclasses.DMP import as_expr [as 别名]
def legendre_poly(n, x=None, **args):
"""Generates Legendre polynomial of degree `n` in `x`. """
if n < 0:
raise ValueError("can't generate Legendre polynomial of degree %s" % n)
poly = DMP(dup_legendre(int(n), QQ), QQ)
if x is not None:
poly = Poly.new(poly, x)
else:
poly = PurePoly.new(poly, Dummy('x'))
if not args.get('polys', False):
return poly.as_expr()
else:
return poly示例7: chebyshevu_poly
# 需要导入模块: from sympy.polys.polyclasses import DMP [as 别名]
# 或者: from sympy.polys.polyclasses.DMP import as_expr [as 别名]
def chebyshevu_poly(n, x=None, **args):
"""Generates Chebyshev polynomial of the second kind of degree `n` in `x`. """
if n < 0:
raise ValueError("can't generate 2nd kind Chebyshev polynomial of degree %s" % n)
poly = DMP(dup_chebyshevu(int(n), ZZ), ZZ)
if x is not None:
poly = Poly.new(poly, x)
else:
poly = PurePoly.new(poly, Dummy('x'))
if not args.get('polys', False):
return poly.as_expr()
else:
return poly示例8: cyclotomic_poly
# 需要导入模块: from sympy.polys.polyclasses import DMP [as 别名]
# 或者: from sympy.polys.polyclasses.DMP import as_expr [as 别名]
def cyclotomic_poly(n, x=None, **args):
"""Generates cyclotomic polynomial of order `n` in `x`. """
if n <= 0:
raise ValueError("can't generate cyclotomic polynomial of order %s" % n)
poly = DMP(dup_zz_cyclotomic_poly(int(n), ZZ), ZZ)
if x is not None:
poly = Poly.new(poly, x)
else:
poly = PurePoly.new(poly, Dummy('x'))
if not args.get('polys', False):
return poly.as_expr()
else:
return poly示例9: jacobi_poly
# 需要导入模块: from sympy.polys.polyclasses import DMP [as 别名]
# 或者: from sympy.polys.polyclasses.DMP import as_expr [as 别名]
def jacobi_poly(n, a, b, x=None, **args):
"""Generates Jacobi polynomial of degree `n` in `x`. """
if n < 0:
raise ValueError("can't generate Jacobi polynomial of degree %s" % n)
K, v = construct_domain([a, b], field=True)
poly = DMP(dup_jacobi(int(n), v[0], v[1], K), K)
if x is not None:
poly = Poly.new(poly, x)
else:
poly = PurePoly.new(poly, Dummy('x'))
if not args.get('polys', False):
return poly.as_expr()
else:
return poly示例10: spherical_bessel_fn
# 需要导入模块: from sympy.polys.polyclasses import DMP [as 别名]
# 或者: from sympy.polys.polyclasses.DMP import as_expr [as 别名]
def spherical_bessel_fn(n, x=None, **args):
"""
Coefficients for the spherical Bessel functions.
Those are only needed in the jn() function.
The coefficients are calculated from:
fn(0, z) = 1/z
fn(1, z) = 1/z**2
fn(n-1, z) + fn(n+1, z) == (2*n+1)/z * fn(n, z)
Examples
========
>>> from sympy.polys.orthopolys import spherical_bessel_fn as fn
>>> from sympy import Symbol
>>> z = Symbol("z")
>>> fn(1, z)
z**(-2)
>>> fn(2, z)
-1/z + 3/z**3
>>> fn(3, z)
-6/z**2 + 15/z**4
>>> fn(4, z)
1/z - 45/z**3 + 105/z**5
"""
from sympy import sympify
if n < 0:
dup = dup_spherical_bessel_fn_minus(-int(n), ZZ)
else:
dup = dup_spherical_bessel_fn(int(n), ZZ)
poly = DMP(dup, ZZ)
if x is not None:
poly = Poly.new(poly, 1/x)
else:
poly = PurePoly.new(poly, 1/Dummy('x'))
if not args.get('polys', False):
return poly.as_expr()
else:
return poly示例11: gegenbauer_poly
# 需要导入模块: from sympy.polys.polyclasses import DMP [as 别名]
# 或者: from sympy.polys.polyclasses.DMP import as_expr [as 别名]
def gegenbauer_poly(n, a, x=None, **args):
"""Generates Gegenbauer polynomial of degree `n` in `x`. """
if n < 0:
raise ValueError("can't generate Gegenbauer polynomial of degree %s" % n)
K, a = construct_domain(a, field=True)
poly = DMP(dup_gegenbauer(int(n), a, K), K)
if x is not None:
poly = Poly.new(poly, x)
else:
poly = PurePoly.new(poly, Dummy('x'))
if not args.get('polys', False):
return poly.as_expr()
else:
return poly示例12: laguerre_poly
# 需要导入模块: from sympy.polys.polyclasses import DMP [as 别名]
# 或者: from sympy.polys.polyclasses.DMP import as_expr [as 别名]
def laguerre_poly(n, x=None, alpha=None, **args):
"""Generates Laguerre polynomial of degree `n` in `x`. """
if n < 0:
raise ValueError("can't generate Laguerre polynomial of degree %s" % n)
if alpha is not None:
K, alpha = construct_domain(alpha, field=True) # XXX: ground_field=True
else:
K, alpha = QQ, QQ(0)
poly = DMP(dup_laguerre(int(n), alpha, K), K)
if x is not None:
poly = Poly.new(poly, x)
else:
poly = PurePoly.new(poly, Dummy('x'))
if not args.get('polys', False):
return poly.as_expr()
else:
return poly示例13: legendre_poly
# 需要导入模块: from sympy.polys.polyclasses import DMP [as 别名]
# 或者: from sympy.polys.polyclasses.DMP import as_expr [as 别名]
def legendre_poly(n, x=None, polys=False):
"""Generates Legendre polynomial of degree `n` in `x`.
Parameters
----------
n : int
`n` decides the degree of polynomial
x : optional
polys : bool, optional
``polys=True`` returns an expression, otherwise
(default) returns an expression.
"""
if n < 0:
raise ValueError("can't generate Legendre polynomial of degree %s" % n)
poly = DMP(dup_legendre(int(n), QQ), QQ)
if x is not None:
poly = Poly.new(poly, x)
else:
poly = PurePoly.new(poly, Dummy('x'))
return poly if polys else poly.as_expr()示例14: cyclotomic_poly
# 需要导入模块: from sympy.polys.polyclasses import DMP [as 别名]
# 或者: from sympy.polys.polyclasses.DMP import as_expr [as 别名]
def cyclotomic_poly(n, x=None, polys=False):
"""Generates cyclotomic polynomial of order `n` in `x`.
Parameters
----------
n : int
`n` decides the order of polynomial
x : optional
polys : bool, optional
``polys=True`` returns an expression, otherwise
(default) returns an expression.
"""
if n <= 0:
raise ValueError(
"can't generate cyclotomic polynomial of order %s" % n)
poly = DMP(dup_zz_cyclotomic_poly(int(n), ZZ), ZZ)
if x is not None:
poly = Poly.new(poly, x)
else:
poly = PurePoly.new(poly, Dummy('x'))
return poly if polys else poly.as_expr()