The CORE statement invokes an algorithm that finds the core decomposition of the input graph. Core decompositions are described in the section Core Decomposition.
You can specify the following options in the CORE statement:
-
LINKS=IN | OUT | BOTH
specifies which type of cores to calculate for a directed graph. You can choose to calculate the cores based on in-links (IN), out-links (OUT), or both (BOTH). For an undirected graph, core applies only to out-links.
Table 26: Values for the LINKS= Option
| Option Value | Description |
|---|
| IN | Calculates core based on in-links. |
| OUT | Calculates core based on out-links. This is the default. |
| BOTH | Calculates core based on in-links and out-links. |
-
LOGLEVEL=number | string
controls the amount of information that is displayed in the SAS log. Table 27 describes the valid values for this option.
Table 27: Values for LOGLEVEL= Option
| number | string | Description |
|---|
| 0 | NONE | Turns off all algorithm-related messages in the SAS log |
| 1 | BASIC | Displays a basic summary of the algorithmic processing |
| 2 | MODERATE | Displays a summary of the algorithmic processing |
| 3 | AGGRESSIVE | Displays a detailed summary of the algorithmic processing |
The default is the value that is specified in the LOGLEVEL= option in the PROC OPTGRAPH statement (or BASIC if that option is not specified).
-
MAXTIME=number
specifies the maximum amount of time to spend in the core decomposition algorithm. The type of time (either CPU time or real time) is determined by the value of the TIMETYPE= option. The value of number can be any positive number; the default value is the positive number that has the largest absolute value that can be represented in your operating environment.