本文整理匯總了Python中fipy.variables.variable.Variable.std方法的典型用法代碼示例。如果您正苦於以下問題:Python Variable.std方法的具體用法?Python Variable.std怎麽用?Python Variable.std使用的例子?那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類fipy.variables.variable.Variable
的用法示例。
在下文中一共展示了Variable.std方法的1個代碼示例,這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚,您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: std
# 需要導入模塊: from fipy.variables.variable import Variable [as 別名]
# 或者: from fipy.variables.variable.Variable import std [as 別名]
def std(self, axis=None, **kwargs):
"""Evaluate standard deviation of all the elements of a `MeshVariable`.
Adapted from http://mpitutorial.com/tutorials/mpi-reduce-and-allreduce/
>>> import fipy as fp
>>> mesh = fp.Grid2D(nx=2, ny=2, dx=2., dy=5.)
>>> var = fp.CellVariable(value=(1., 2., 3., 4.), mesh=mesh)
>>> print((var.std()**2).allclose(1.25))
True
"""
if self.mesh.communicator.Nproc > 1 and (axis is None or axis == len(self.shape) - 1):
def stdParallel(a):
N = self.mesh.globalNumberOfCells
mean = self.sum(axis=axis).value / N
sq_diff = (self - mean)**2
return numerix.sqrt(sq_diff.sum(axis=axis).value / N)
return self._axisOperator(opname="stdVar",
op=stdParallel,
axis=axis)
else:
return Variable.std(self, axis=axis)