The set rrange command sets the radial range used to compute x and y
values when in polar mode. If not in polar mode (see set polar) then
this range is not used. Use of this command offsets the polar
singularity to the <rmin> value and shifts the units on the axes tic
marks. For instance, set rrange [-40:40] would set the origin to -40
and would plot values of radial values between -40 to 40. Thus, if
360 degrees of data were plotted, then the plot would extend 80 units
in radially from the origin. To view the entire plot, a
set yrange [-80:80] command would create a square viewport with
a circular plot tangent at the axes. Because xrange is used
specify the angular extent, only a square viewport can be specified
by yrange. For instance, set yrange [0:80] would display the
first quadrant and set yrange [-80:0] would display the third
quadrant. Any square viewport of any size can be specified but it
is constrained to be centered on a 45 degree line.
This range may also be specified on the plot command line when in
polar mode.
Syntax:
set rrange [{<rmin> : <rmax>}]
where <rmin> and <rmax> terms are constants or expressions.
Both the <rmin> and <rmax> terms are optional. Anything omitted will
not be changed, so
set rrange [:10]
changes rmax to 10 without affecting rmin.