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Python Variables.get_matrix_shape方法代码示例

本文整理汇总了Python中sfepy.discrete.Variables.get_matrix_shape方法的典型用法代码示例。如果您正苦于以下问题:Python Variables.get_matrix_shape方法的具体用法?Python Variables.get_matrix_shape怎么用?Python Variables.get_matrix_shape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sfepy.discrete.Variables的用法示例。


在下文中一共展示了Variables.get_matrix_shape方法的1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: Equations

# 需要导入模块: from sfepy.discrete import Variables [as 别名]
# 或者: from sfepy.discrete.Variables import get_matrix_shape [as 别名]

#.........这里部分代码省略.........
        Create tangent matrix graph, i.e. preallocate and initialize the
        sparse storage needed for the tangent matrix. Order of DOF
        connectivities is not important.

        Parameters
        ----------
        any_dof_conn : bool
            By default, only volume DOF connectivities are used, with
            the exception of trace surface DOF connectivities. If True,
            any kind of DOF connectivities is allowed.
        rdcs, cdcs : arrays, optional
            Additional row and column DOF connectivities, corresponding
            to the variables used in the equations.
        shape : tuple, optional
            The required shape, if it is different from the shape
            determined by the equations variables. This may be needed if
            additional row and column DOF connectivities are passed in.
        active_only : bool
            If True, the matrix graph has reduced size and is created with the
            reduced (active DOFs only) numbering.
        verbose : bool
            If False, reduce verbosity.

        Returns
        -------
        matrix : csr_matrix
            The matrix graph in the form of a CSR matrix with
            preallocated structure and zero data.
        """
        if not self.variables.has_virtuals():
            output('no matrix (no test variables)!')
            return None

        shape = get_default(shape, self.variables.get_matrix_shape())

        output('matrix shape:', shape, verbose=verbose)
        if nm.prod(shape) == 0:
            output('no matrix (zero size)!')
            return None

        rdcs, cdcs = self.get_graph_conns(any_dof_conn=any_dof_conn,
                                          rdcs=rdcs, cdcs=cdcs,
                                          active_only=active_only)

        if not len(rdcs):
            output('no matrix (empty dof connectivities)!')
            return None

        output('assembling matrix graph...', verbose=verbose)
        tt = time.clock()

        nnz, prow, icol = create_mesh_graph(shape[0], shape[1],
                                            len(rdcs), rdcs, cdcs)

        output('...done in %.2f s' % (time.clock() - tt), verbose=verbose)
        output('matrix structural nonzeros: %d (%.2e%% fill)' \
               % (nnz, float(nnz) / nm.prod(shape)), verbose=verbose)

        data = nm.zeros((nnz,), dtype=self.variables.dtype)
        matrix = sp.csr_matrix((data, icol, prow), shape)

        return matrix

    def init_time(self, ts):
        pass
开发者ID:Gkdnz,项目名称:sfepy,代码行数:69,代码来源:equations.py


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