!NGROUP¶

Definition of node groups

First line

!NGROUP, NGRP=<ngrp> [, optional parameter]

Parameter
`NGRP`	Node group name (required)
`GENERATE`	Automatic generation of nodes belonging to the node group (optional)
`INPUT`	External file name (optional)

Parameter	Value	Description
`NGRP`	<ngrp>	Node group name
`GENERATE`	None	Automatic generation of nodes belonging to the node group
`INPUT`	<filename>	External file name (optional); may also be used with the second and subsequent lines

Second and subsequent lines (when GENERATE is not used)

(2nd line) nod1, nod2, nod3
(Continue in the same format.)

Variable	Type	Description
nodX	I	Node number belonging to the node group

Second and subsequent lines (when GENERATE is used)

(2nd line) nod1, nod2, nod3
(Continue in the same format.)

Variable	Type	Description
nod1	I	First node number in the node group
nod2	I	Last node number in the node group
nod3	I	Node number increment (optional; if omitted, nod3=1)

Notes

Any number of nodes may be placed on one line. Any number of lines may also be inserted until the next option begins.
The specified nodes must be defined before "!NGROUP".
Nodes not defined by the "!NODE" option are excluded and a warning message is displayed.
If a specified node already exists in the same group, it is ignored and a warning message is displayed.
All nodes belong to the node group named "ALL" (generated automatically).
A single group may be defined in multiple separate definitions.

Example

!NGROUP, NGRP= NA01
1, 2, 3, 4, 5, 6
101, 102
!NGROUP, NGRP= NA02
101, 102
!NGROUP, NGRP= NA01              --- "501, 505" are added to group "NA01".
501, 505
!NGROUP, NGRP= NA02              --- "501, 505" are added to group "NA02".
501, 505
!NGROUP, NGRP= NA04,GENERATE     --- to group "NA04",
301, 309, 2                      --- "301,303,305,307,309,311,312,313" are added.
311, 313