Plot data only

The GRAPH\OVERLAY command plots the data, but does not draw axes. Autoscaling will not apply. The GRAPH\OVERLAY command overlays on an existing set of axes. For example:

 GRAPH\OVERLAY X Y      ! overlay data curve on current axes
 GRAPH\HIST\OVER X Y   ! overlay histogram on current axes
 

If LEGENDON is true, i.e., non-zero, then the data variables are not necessary. That is, you can enter:

 GRAPH\OVERLAY 'legendentry'
 

and an entry will be made to the legend, but no curves are plotted. The plotting symbol, as set by the PLOTSYMBOL characteristic, will be used in the legend.

  Plot axes only
  Plot a smooth curve through the data