• The PLOT Command:
    • PLOT is typically run with one or more files as an input.
    • To input multiple files, separate each file by a bar character (|).
      nM> plot world.shp|cities.prm
    • Attributes for each layer can be changed in line with the LAYER={...} qualifier.
      nM> plot world.shp{TAG=COUNTRIES,LAYER={OPAQ=0,LABEL=NAME}}|&
                   cities.prm{LAYER={COLOR=RED}} 
      In the above example the qualifiers LAYER={OPAQ=0,LABEL=NAME} tells the plot layer to make the opaqueness zero (i.e. transparent) and to show a label on the readout with the NAME of the country.
    • By default layer names are automatically set to match the root name of the file. this can be overridden using the TAG= qualifier.
      • For example: Because of duplicate tags, only one of files shows up.
        nM> plot world.shp{LAYER={OPAQ=0}}|world.prm
      • This will work.
        nM> plot world.shp{TAG=SHP,LAYER={OPAQ=0}}|world.prm{TAG=PRM}
    • In order to use messages, one must add the /msgid= switch. (This is discussed more in the module on Macros.)
    • The PLOT command takes in a number of command line parameters allowing customization of the plot.
      • Most of these options are settable using reg.<id>.<option>.
      • A few examples:
        • Setting Y-axis limits (Y1, Y2).
          nM> plot/bg/id=myplot fftdemo.prm Y1=50 Y2=150
          or
          nM> plot/bg/id=myplot fftdemo.prm
          nM> set reg.myplot.y1 50
          nM> set reg.myplot.y2 150
        • Setting the view of a map.
          nM> plot/bg/id=myplot nxm.sys.dat.world.prm|cities.prm view=MERCATOR
          nM> set reg.myplot.view LATLON
          nM> set reg.myplot.view GEO