本文整理汇总了Python中numpy.polynomial.legendre.legroots方法的典型用法代码示例。如果您正苦于以下问题：Python legendre.legroots方法的具体用法？Python legendre.legroots怎么用？Python legendre.legroots使用的例子？那么, 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numpy.polynomial.legendre的用法示例。
在下文中一共展示了legendre.legroots方法的3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: _getNodes
# 需要导入模块: from numpy.polynomial import legendre [as 别名]
# 或者: from numpy.polynomial.legendre import legroots [as 别名]
def _getNodes(self):
"""
Computes Gauss-Lobatto integration nodes.
Calculates the Gauss-Lobatto integration nodes via a root calculation of derivatives of the legendre
polynomials. Note that the precision of float 64 is not guarantied.
Copyright by Dieter Moser, 2014
Returns:
np.ndarray: array of Gauss-Lobatto nodes
"""
M = self.num_nodes
a = self.tleft
b = self.tright
roots = leg.legroots(leg.legder(np.array([0] * (M - 1) + [1], dtype=np.float64)))
nodes = np.array(np.append([-1.0], np.append(roots, [1.0])), dtype=np.float64)
nodes = (a * (1 - nodes) + b * (1 + nodes)) / 2
return nodes 示例2: test_legroots
# 需要导入模块: from numpy.polynomial import legendre [as 别名]
# 或者: from numpy.polynomial.legendre import legroots [as 别名]
def test_legroots(self):
assert_almost_equal(leg.legroots([1]), [])
assert_almost_equal(leg.legroots([1, 2]), [-.5])
for i in range(2, 5):
tgt = np.linspace(-1, 1, i)
res = leg.legroots(leg.legfromroots(tgt))
assert_almost_equal(trim(res), trim(tgt)) 示例3: test_legroots
# 需要导入模块: from numpy.polynomial import legendre [as 别名]
# 或者: from numpy.polynomial.legendre import legroots [as 别名]
def test_legroots(self) :
assert_almost_equal(leg.legroots([1]), [])
assert_almost_equal(leg.legroots([1, 2]), [-.5])
for i in range(2, 5) :
tgt = np.linspace(-1, 1, i)
res = leg.legroots(leg.legfromroots(tgt))
assert_almost_equal(trim(res), trim(tgt))