Re: [Gnuplot-info] drawing horizontal line

[Theo <th...@gm...>]

actually, if your x-axis is changing, the following would be better.

set arrow 1 from graph 0,first 0 to graph 1,first 0 nohead

It draws a horizontal line from the left to the right side of the graph 
at position y=0 of the first (x1) axis.