gnuplot documentation

70 SET-SHOW gnuplot 4.3 131
they make with the arrow. is in x-axis units; this can be changed by first, second, graph,
screen, or character before the ; see coordinates (p. 24) for details. only
takes effect when filled or empty is also used. Then, is the angle (in degrees) the back
branches make with the arrow (in the same direction as ). The fig terminal has a restricted
backangle function. It supports three different angles. There are two thresholds: Below 70 degrees, the
arrow head gets an indented back angle. Above 110 degrees, the arrow head has an acute back angle.
Between these thresholds, the back line is straight.
Specifying filled produces filled arrow heads (if heads are used). Filling is supported on filled-polygon
capable terminals, see help of pm3d (p. 118) for their list, otherwise the arrow heads are closed but
not filled. The same result (closed but not filled arrow head) is reached by specifying empty. Further,
filling and outline is obviously not supported on terminals drawing arrows by their own specific routines,
like metafont, metapost, latex or tgif.
The line style may be selected from a user-defined list of line styles (see set style line (p. 133)) or may
be defined here by providing values for (an index from the default list of styles) and/or
(which is a multiplier for the default width).
Note, however, that if a user-defined line style has been selected, its properties (type and width) cannot
be altered merely by issuing another set style arrow command with the appropriate index and lt or
lw.
If front is given, the arrows are written on top of the graphed data. If back is given (the default), the
arrow is written underneath the graphed data. Using front will prevent a arrow from being obscured
by dense data.
Examples:
To draw an arrow without an arrow head and double width, use:
set style arrow 1 nohead lw 2
set arrow arrowstyle 1
See also ‘set arrow‘ for further examples.
70.59.2 Set style data
The set style data command changes the default plotting style for data plots.
Syntax:
set style data
show style data
See plotting styles (p. 40) for the choices. If no choice is given, the choices are listed. show style
data shows the current default data plotting style.
70.59.3 Set style fill
The set style fill command is used to set the style of boxes, histograms, candlesticks and filledcurves.
Syntax:
set style fill {empty
| {transparent} solid {}
| {transparent} pattern {}}
{border {} | noborder}
The default fillstyle is empty.
The solid option causes filling with a solid color, if the terminal supports that. The parameter
specifies the intensity of the fill color. At a of 0.0, the box is empty, at of 1.0,
the inner area is of the same color as the current linetype. Some terminal types can vary the density
continuously; others implement only a few levels of partial fill. If no parameter is given, it
defaults to 1.