gnuplot documentation

94 gnuplot 4.3 70 SET-SHOW
set style line 2604 linetype -1 linewidth .4
set colorbox border 2604
will use line style 2604, a thin line with the default border color (-1) for drawing the border. bdefault
(which is the default) will use the default border line style for drawing the border of the color box.
The axis of the color box is called cb and it is controlled by means of the usual axes commands,
i.e. set/unset/show with cbrange, [m]cbtics, format cb, grid [m]cb, cblabel, and perhaps even
cbdata, [no]cbdtics, [no]cbmtics.
set colorbox without any parameter switches the position to default.
default parameters for the colorbox and switches the colorbox off.
unset colorbox resets the
See also help for set pm3d (p. 118), set palette (p. 122), x11 pm3d (p. 204), and set style line
(p. 133).
70.12 Contour
set contour enables contour drawing for surfaces. This option is available for splot only. It requires
grid data, see grid data (p. 153) for more details. If contours are desired from non-grid data, set
dgrid3d can be used to create an appropriate grid.
Syntax:
set contour {base | surface | both}
unset contour
show contour
The three options specify where to draw the contours: base draws the contours on the grid base where
the x/ytics are placed, surface draws the contours on the surfaces themselves, and both draws the
contours on both the base and the surface. If no option is provided, the default is base.
See also set cntrparam (p. 92) for the parameters that affect the drawing of contours, and set clabel
(p. 91) for control of labelling of the contours.
The surface can be switched off (see set surface (p. 134)), giving a contour-only graph. Though it is
possible to use set size to enlarge the plot to fill the screen, more control over the output format can
be obtained by writing the contour information to a file, and rereading it as a 2D datafile plot:
unset surface
set contour
set cntrparam ...
set table ’filename’
splot ...
unset table
# contour info now in filename
set term
plot ’filename’
In order to draw contours, the data should be organized as "grid data". In such a file all the points for
a single y-isoline are listed, then all the points for the next y-isoline, and so on. A single blank line (a
line containing no characters other than blank spaces and a carriage return and/or a line feed) separates
one y-isoline from the next. See also splot datafile (p. 150).
See also
and
contours demo (contours.dem)
contours with user defined levels demo (discrete.dem).
70.13 Data style
This form of the command is deprecated. Please see set style data (p. 131).