The OPTGRAPH Procedure

DATA_LINKS_VAR Statement

DATA_LINKS_VAR < options >;

LINKS_VAR < options >;

The DATA_LINKS_VAR statement enables you to explicitly define the data set variable names for PROC OPTGRAPH to use when it reads the data set that is specified in the DATA_LINKS= option in the PROC OPTGRAPH statement. The format of the links input data set is defined in the section Link Input Data.

You can specify the following options in the DATA_LINKS_VAR statement:

FROM=column: specifies the data set variable name for the from nodes. The value of column can be numeric or character.
LOWER=column: specifies the data set variable name for the link flow lower bounds. The value of column must be numeric.
TO=column: specifies the data set variable name for the to nodes. The value of column can be numeric or character.
UPPER=column: specifies the data set variable name for the link flow upper bounds. The value of column must be numeric.
WEIGHT=column: specifies the data set variable name for the link weights. The value of column must be numeric.