The NETDRAW Procedure

In this example, the construction project described in Example 9.7 is used to illustrate some more time-scale options. First, the REFBREAK option indicates breaks in the time axis by drawing a zigzag line down the diagram before each tick mark corresponding to a break. The CREFBRK= and LREFBRK= options control the color and line style for these lines. The network diagram is shown in Output 9.10.1.

title j=l h=1.5 ' Site: Old Well Road';
title2 j=l h=1.5 ' Date: January 1, 2004';
footnote j=r h=1.5 'Time Scale Options: Reference Breaks ';


proc netdraw data=sched graphics;
   actnet / act = task
            dur = duration
            succ = (succesr1-succesr3)
            dp compress separatearcs
            font=swiss htext=2
            timescale refbreak lrefbrk = 33
            carcs=cyan crefbrk = blue;           
   run;

Next, PROC NETDRAW is invoked with the LINEAR option so that there is no break in the time axis. The BOXWIDTH= option limits the size of each node. The diagram is drawn in Output 9.10.2.

title j=l h=1.5 ' Site: Old Well Road';
title2 j=l h=1.5 ' Date: January 1, 2004';
footnote j=r h=1.5 'Time Scale Options: Linear Diagram ';

proc netdraw data=sched graphics;
   actnet / act = task
            dur = duration
            succ = (succesr1-succesr3)
            dp
            pcompress
            novcenter
            vmargin = 10
            separatearcs
            htext=2
            carcs=cyan
            id=(task)
            nodefid
            nolabel
            boxwidth=7
            timescale
            linear
            frame;
   run;