BACKGROUND COLOR
Name:
Type:
Purpose:
Specifies the color of the background.
Description:
The background is "painted" whenever a subsequent screen erasure
takes place. For 2-dimensional graphics (e.g., PLOT, HISTOGRAM,
BOX PLOT, etc.), the background is the region inside the frame
lines (while the region outside the frame lines is the "margin").
For 3-dimensional graphics (3D-PLOT), the background region is the
entire screen. For diagrammatic graphics (e.g., TEXT, ARC, BOX,
CIRCLE, etc..), the background region is also the entire screen.
Dataplot provides two methods for specifying colors.
- Colors can be defined by name (or by the corresponding index).
Dataplot adopted it's named colors from the X11 project.
Currently, 162 named colors and 100 levels of grayscale are
supported. Grayscale can be specified with either G0, G1, ...,
G100 (or -1, -2, ..., -100). Many older devices support only a
limited number of colors. For these devices, unsupported colors
will be mapped to one of the available colors. To specify a
named color, see Syntax 1.
- Most modern graphics devices support full RGB (RedBlueGreen)
color. You can alternatively specify RGB colors by entering
three integer values to represent the Red, Green and Blue
components, respectively. These values should be in the range
0 to 255.
When setting the background color, Dataplot first checks if the device
supports RGB colors. If not, the named color will be used. If the
device does support RGB color, Dataplot will check if an RGB color
has been specified. If yes, then that RGB color is used. If not,
the named color will be used.
To see the list of supported named colors (with the associated index
number), see
https://www.itl.nist.gov/div898/software/dataplot/refman1/ch11/homepage.htm
Syntax 1:
BACKGROUND COLOR <color>
where <color> is the desired background color.
Syntax 2:
BACKGROUND RGB COLOR <ired> <igreen> <iblue>
where <ired> specifies the red component of the background
color;
<igreen> specifies the green component of the background
color;
and <iblue> specifies the blue component
of the background color.
The components should be integer values in the range 0 - 255. To turn
off the RGB color, set the components to -1 (any negative value will
work and if any of the three components is negative the RGB color will
be turned off).
Examples:
BACKGROUND COLOR GREEN
BACKGROUND COLOR YELLOW
BACKGROUND COLOR YELLOW
BACKGROUND RGB COLOR 90 167 102
BACKGROUND RGB COLOR 110 205 65
Note:
When you enter the BACKGROUND COLOR command, this will also set the
MARGIN COLOR to the same color. If you want the MARGIN COLOR to be
different than the BACKGROUND COLOR, then enter the MARGIN COLOR
after the BACKGROUND COLOR command.
Note:
The BACKGROUND COLOR command with no arguments sets the background
color to default. For a list of available colors, enter HELP COLOR
TYPES.
Note:
This command is device dependent in that some device may not let
you set the background color. In addition, devices vary in the
colors that they support.
Postscript and SVG devices set the background color for the first
plot when the device is initialized, not at the first clear screen
(e.g., the first PLOT command). For this reason, if you want to set
the background color for the first plot, the BACKGROUND COLOR command
should be entered before the DEVICE 2 POSTSCRIPT or DEVICE 2 SVG
command.
Default:
The default background color is white.
Synonyms:
Related Commands:
Applications:
Implementation Date:
Pre-1987
2021/03: Support for the BACKGROUND RGB COLOR option
Program:
background color cyan
background rgb color 110 205 65
.
line thickness 0.5
line color yellow
title case asis
title offset 2
title Sample Plot
label case asis
x1label x
y1label x**2
.
plot x**2 for x = 1 1 9
Date created: 03/30/2021
Last updated: 12/11/2023
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[email protected].
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