The set xrange command sets the horizontal range that will be displayed. This command turns x axis autoscaling off.
This range may also be specified on the plot command line.
Syntax:
set xrange [{<xmin> : <xmax>}]
where <xmin> and <xmax> terms are constants or expressions.
Both the <xmin> and <xmax> terms are optional. Anything omitted will not be changed, so
set xrange [:10]changes xmax to 10 without affecting xmin.