GNU Info

(gnuplot.info)zeroaxis

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Enter node , (file) or (file)node

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

 Syntax:
       set {x|x2|y|y2|}zeroaxis { {linestyle | ls <line_style>}
                                  | { linetype | lt <line_type>}
                                    { linewidth | lw <line_width>}}
       set no{x|x2|y|y2|}zeroaxis
       show {x|y|}zeroaxis


 By default, these options are off.  The selected zero axis is drawn
 with a line of type <line_type> and width <line_width> (if supported
 by the terminal driver currently in use), or a user-defined style
 <line_style>.

 If no linetype is 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`.