gnuplot documentation

70 SET-SHOW gnuplot 4.3 133
plot f1(x), f2(x), f3(x), f4(x)
should plot functions f1, f2, f4 in your 3 newly defined line styles. If a user-defined line style is not found
then the corresponding default linetype is used instead. E.g. in the example above, f3(x) will be plotted
using the default linetype 3.
70.59.6 Set style line
Each terminal has a default set of line and point types, which can be seen by using the command test.
set style line defines a set of line 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 line default
set style line {{linetype
unset style line
show style line
| lt} | }
{{linecolor | lc} }
{{linewidth | lw} }
{{pointtype | pt} }
{{pointsize | ps} }
{palette}
If default is given all line style parameters are set to their default values.
If the linestyle already exists, only the given parameters are changed while all others are
preserved. If not, all undefined values are set to the default values.
The line and point types are taken from the default types for the terminal currently in use. The line
width and point size are multipliers for the default width and size (but note that here is
unaffected by the multiplier given on set pointsize).
The defaults for the line and point types is the index. The defaults for the width and size are both unity.
Linestyles created by this mechanism do not replace the default linetype styles; both may be used. If
you want plots to use the defined styles in preference to the default linetypes, please see set style
increment (p. 132).
Not all terminals support the linewidth and pointsize features; if not supported, the option will be
ignored.
Terminal-independent colors may be assigned using either linecolor or linetype
, abbreviated lc or lt. This requires giving a RGB color triple, a known palette color
name, a fractional index into the current palette, or a constant value from the current mapping of the
palette onto cbrange. See colors (p. 31), colorspec (p. 32), set palette (p. 122), colornames
(p. 126), cbrange (p. 149).
set style line linetype will set both a terminal-dependent dot/dash pattern and color. The
commandsset style line linecolor or set style line linetype
will set a new line color while leaving the existing dot-dash pattern unchanged.
In 3d mode (splot command), the special keyword palette is allowed as a shorthand for "linetype
palette z". The color value corresponds to the z-value (elevation) of the splot, and varies smoothly along
a line or surface.
Examples: Suppose that the default lines for indices 1, 2, and 3 are red, green, and blue, respectively,
and the default point shapes for the same indices are a square, a cross, and a triangle, respectively. Then
set style line 1 lt 2 lw 2 pt 3 ps 0.5
defines a new linestyle that is green and twice the default width and a new pointstyle that is a half-sized
triangle. The commands
set style function lines
plot f(x) lt 3, g(x) ls 1