gnuplot documentation

130 gnuplot 4.3 70 SET-SHOW
To make the graph half size and square use:
set size square 0.5,0.5
To make the graph twice as high as wide use:
set size ratio 2
See also
airfoil demo.
70.59 Style
Default plotting styles are chosen with the set style data and set style function commands. See plot
with (p. 79) for information about how to override the default plotting style for individual functions
and data sets. See plotting styles (p. 40) for a complete list of styles.
Syntax:
set style function
set style data
show style function
show style data
Default styles for specific plotting elements may also be set.
Syntax:
set style arrow
set style fill
set style histogram
set style line
70.59.1 Set style arrow
Each terminal has a default set of arrow and point types, which can be seen by using the command test.
set style arrow defines a set of arrow types and widths and point types and sizes so that you can refer
to them later by an index instead of repeating all the information at each invocation.
Syntax:
set style arrow default
set style arrow {nohead | head | heads}
{size ,{,}}
{filled | empty | nofilled}
{front | back}
{ {linestyle | ls }
| {linetype | lt }
{linewidth | lw