GNUPlot Manual

56 gnuplot 4.0 36 SET-SHOW
36.5 Bmargin
The command set bmargin sets the size of the bottom margin. Please see set margin (p. 77) for
details.
36.6 Border
The set border and unset border commands control the display of the graph borders for the plot
and splot commands. Note that the borders do not necessarily coincide with the axes; with plot they
often do, but with splot they usually do not.
Syntax:
set border { { {linestyle | ls }
| {linetype | lt }
{linewidth | lw } } }
unset border
show border
With a splot displayed in an arbitrary orientation, like set view 56,103, the four corners of the x-y
plane can be referred to as "front", "back", "left" and "right". A similar set of four corners exist for
the top surface, of course. Thus the border connecting, say, the back and right corners of the x-y plane
is the "bottom right back" border, and the border connecting the top and bottom front corners is the
"front vertical". (This nomenclature is defined solely to allow the reader to figure out the table that
follows.)
The borders are encoded in a 12-bit integer: the bottom four bits control the border for plot and the
sides of the base for splot; the next four bits control the verticals in splot; the top four bits control the
edges on top of the splot. In detail, should be the sum of the appropriate entries from the
following table:
Graph Border Encoding
Bit plot splot
1 bottom bottom left front
2 left bottom left back
4 top bottom right front
8 right bottom right back
16 no effect left vertical
32 no effect back vertical
64 no effect right vertical
128 no effect front vertical
256 no effect top left back
512 no effect top right back
1024 no effect top left front
2048 no effect top right front
Various bits or combinations of bits may be added together in the command.
The default is 31, which is all four sides for plot, and base and z axis for splot.
Using the optional , and specifiers, the way the border lines are
drawn can be influenced (limited by what the current terminal driver supports).
For plot, tics may be drawn on edges other than bottom and left by enabling the second axes – see set
xtics (p. 149) for details.
If a splot draws only on the base, as is the case with "unset surface; set contour base", then the
verticals and the top are not drawn even if they are specified.
The set grid options ’back’, ’front’ and ’layerdefault’ also control the order in which the border lines
are drawn with respect to the output of the plotted data.
Examples: