Legacy Line Printer Displays

The following SAS/QC procedures continue to support legacy line printer charts and plots, drawn with characters, which are produced in the SAS output listing:

  • CAPABILITY

  • CUSUM

  • MACONTROL

  • PARETO

  • SHEWHART

Beginning with SAS 7, these procedures produce high-resolution graphics by default, and you must specify the LINEPRINTER option in the PROC statement to create line printer charts, as illustrated by the following statements.

title 'Process Capability Analysis of Plating Thickness';
proc capability data=Trans noprint lineprinter;
   spec lsl=3.45 usl=3.55;
   histogram Thickness;
run;

The resulting histogram is shown in Figure 3.14.

Figure 3.14: Legacy Line Printer Display

Process Capability Analysis of Plating Thickness

              -------------------------------------------------------           
          25 +               L                             U         |          
             |               L  -------     -------        U         |          
             |               L  |     |     |     |        U         |          
          20 +               L  |     |     |     |        U         |          
             |               L  |     |-----|     |        U         |          
        P    |               L  |     |     |     |        U         |          
        e 15 +               L  |     |     |     |------  U         |          
        r    |               L  |     |     |     |     |  U         |          
        c    |               L  |     |     |     |     |  U         |          
        e 10 +               L  |     |     |     |     |  U         |          
        n    |            ------|     |     |     |     |  U         |          
        t    |            |  L  |     |     |     |     |  U         |          
           5 +            |  L  |     |     |     |     |  U         |          
             |      ------|  L  |     |     |     |     |------------|          
             |      |     |  L  |     |     |     |     |  U  |     ||          
           0 +      |     |  L  |     |     |     |     |  U  |     ||          
              ---+-----+-----+-----+-----+-----+-----+-----+-----+---           
               3.41  3.43  3.45  3.47  3.49  3.51  3.53  3.55  3.57             
                                                                                
                             Plating Thickness (mils)                           
                                                                                
        Specifications:   LLL Lower = 3.45    UUU Upper = 3.55                  


In SAS/QC, some charts and plots are not supported with the LINEPRINTER option. For example, line printer displays are not available with the CAPABILITY procedure’s COMPHISTOGRAM statement or the PARETO procedure’s HBAR statement.