Zeroaxis

The x axis may be drawn by set xzeroaxis and removed by set noxzeroaxis. Similar commands behave similarly for the y, x2, and y2 axes.

Syntax:

     set zeroaxis {<linetype>}
     set xzeroaxis {<linetype>}
     set yzeroaxis {<linetype>}
     set x2zeroaxis {<linetype>}
     set y2zeroaxis {<linetype>}
     set nozeroaxis
     set noxzeroaxis
     etc.
     show zeroaxis
     show xzeroaxis
     etc.

By default, these options are off. The selected zero axis is drawn with a line of type <linetype> from the default linetype list provided by the terminal; user-defined linetypes (via the set linestyle command) are not accessible for these axes. If <linetype> is not specified, any zero axes selected will be drawn using the axis linetype (linetype 0).

set zeroaxis l is equivalent to set xzeroaxis l; set yzeroaxis l. set nozeroaxis is equivalent to set noxzeroaxis; set noyzeroaxis.