SAS.GRAPH 9.1 Reference, Volumes I and II
The Constellation Applet displays interactive node/link diagrams. These diagrams can show relationships between nodes and links. The Constellation Applet displays affinity, sequence, and ring diagrams that are generated out of arc, associative, or hierarchical data sets. The Constellation Applet provides a number of interactive features by default, as described in Creating Constellation Diagrams on page 513.
Enhancements to Constellation Applet presentations are configured in your SAS/GRAPH program by specifying arguments in the DS2CONST macro. The following table lists some of the available enhancements and the DS2CONST arguments that implement them. These enhancements enable you to provide data tips and drill-down URLs for nodes and links, and to increase the visible distinctions between the data values that are associated with the nodes and links.
| Enhancements | DS2CONST Arguments |
|---|---|
| Specify link weights and configure a scroll bar that controls the display of links based on weight. | LVALUE, MINLNKWT, SCLNKWT |
| Configure a fish-eye lens for large diagrams. | FACTOR, FISHEYE |
| Lay out the diagram automatically or as specified in a data set. | LAYOUT |
| Specify a stylesheet to format the HTML output file. | BDCLASS, SEPCLASS, SPCLASS, SSFILE, SSHREF See Arguments for Stylesheets on page 554. |
| Add pop-up data tips to nodes and links. | LTIP, NTIP |
| Define responses to node selection by defining JavaScript methods | SELIFUNC, SELNFUND, SELUFUNC |
| Define drill-down URLs for nodes and links. | LURL, NURL |
| Specify menu option text for a drill-down action. | ACTION, NACTION |
| Specify a browser window or frame that displays drill-down URLs. | DRILTARG |
| Add a background color , image, or drill-down URL. | IBACKLOC, IBACKPOS, IBACKURL, |
| Specify text colors, fonts, styles, and sizes. | NFNTNAME, NSFNTNAM, CTEXT, CATEXT See DS2TREE and DS2CONST Arguments for Diagram Appearance on page 545. |
| Specify colors for nodes and links. | NCOLVAL, NCOLOR, CNODE, LCOLVAL, LCOLOR, CLINK |
| Specify dashed link lines. | LSTIP and LSTIPFAC |
Note that a number of enhancements apply only to associative data sets when you specify the macro argument DATATYPE=ASSOC. The macro argument definitions identify which features apply only to associative data.
The DS2CONST macro requires you to specify node and link data sets. As an enhancement, you can define a node styles data set that contains style information only. You can use the node styles data set to standardize the appearance of a series of diagrams, among other uses.
Reference information on the arguments of the DS2CONST macro is provided in DS2CONST Macro Arguments on page 518.