Some possible data representations with VECTOR/DRAW
                                                       
      zone 2 3                                                                                                          
      ve/create v(10) R 5 1 3 2 4 1 3 1 8 6                                                                             
1     SET HTYP 244                                                                                               
      ve/draw v                                                                                                         
      ve/draw v ! b                                                                                                     
      ve/draw v ! l                                                                                                     
3     VE/DRAW V CHOPT=L*                                                                                         
      ve/draw v ! bl*                                                                                                   
2     SET MTYP 21                                                                                                
      ve/draw v ! e                                                                                                     
      ve/de V                                                                                                           
4     RETURN                                                                                                     

1. The command SET defines some high level graphics attributes for commands like VECT/DRAW or HIST/PLOT . Here the HTYP (Histogram hatch TYPe) is defined.
2. Set the marker type.
3. By default the parameters of a command are positional but it is possible to assign values by name, i.e. PARAMETER=value . For example we have here CHOPT=L* . In this case the intermediate ``!'' can be suppressed.

   Note also:

4. The statement RETURN is not mandatory in a macro except if there are several macros in the same file. In this case, a macro within a file can be executed by: EXEC FILENAME#MACRONAME .