mesh.Mesh.select_nodes#

Mesh.select_nodes(nodsel, eltype=None)#

Return a Mesh with subsets of the original nodes.

Parameters#

nodsel: 1-dim or 2-dim int array_like: An object that can be converted to a 1-dim or 2-dim array. Each row of nodsel holds a list of local node numbers that should be retained in the new connectivity table. See also connectivity.Connectivity.select_nodes().
eltype: ElementType or str, optional: The element type or name for the new Mesh. It should be specified if the default for the plexitude would not be correct.

Returns#

Mesh: A Mesh with the same node set as the input but other element connectivity and eltype

Examples#

From a Mesh of triangles, create a Mesh with the edges.

>>> M = Mesh(eltype='quad4').convert('tri3')
>>> M.elems
Elems([[0, 1, 2],
       [2, 3, 0]]..., eltype=Tri3)
>>> M1 = M.select_nodes([(0,1), (1,2), (2,0)])
>>> M1.elems
Elems([[0, 1],
       [1, 2],
       [2, 0],
       [2, 3],
       [3, 0],
       [0, 2]]..., eltype=Line2)