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Dataplot Vol 1 Vol 2

REGION FILL COLOR

Name:
    REGION FILL COLOR
Type:
    Plot Control Command
Purpose:
    Specifies the color used for solid fill regions on subsequent plots or for certain types of diagrammatic graphics.
Description:
    On a plot, a region is defined as the figure formed by the line connecting points belonging to a common trace and a region base (typically zero). The REGION FILL command can be used to generate a solid fill or a cross-hatch fill of this region. The REGION FILL command is used to set the color for solid fill regions (the REGION PATTERN COLOR command is used to set the color for hatch fill regions). Other attributes of the fill are set with additional REGION commands (see the RELATED COMMANDS section below). The attributes of the region border are set with LINE, LINE COLOR, and LINE THICKNESS commands.

    The diagrammatic graphics commands CIRCLE, CUBE, DIAMOND, ELLIPSE, HEXAGON, PYRAMID, SEMI-CIRCLE, and TRIANGLE can be filled using the REGION FILL command. The BOX command has its own attribute setting commands.

    Dataplot provides two methods for specifying colors.

    1. 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.

    2. 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 region fill 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:
    REGION FILL COLOR <color> <color> <color> etc.
    where <color> is a character string or index number that specifies the desired color. Up to 100 region fill colors can be specified.
Syntax 2:
    REGION FILL RGB COLOR <ired> <igreen> <iblue> <ired> <igreen> <iblue> etc.
    where <ired> specifies the red component of the region fill color;
                <igreen> specifies the green component of the region fill color;
    and      <iblue> specifies the blue component of the region fill color.

    Up to 100 triplets of RGB colors can be specified.

    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:
    REGION FILL COLOR RED BLUE GREEN
    REGION FILL COLOR BLACK ALL
    REGION FILL COLOR ALL BLACK
    REGION FILL COLOR
    REGION FILL RGB COLOR 201 101 88
    REGION FILL RGB COLOR 201 101 88 ALL
    REGION FILL RGB COLOR 201 101 88 240 200 175
    REGION FILL RGB COLOR -1 -1 -1 ALL
Default:
    All solid region fills are black.
Synonyms:
    None
Note:
    The diagrammatic graphics commands use the first setting of the REGION FILL COLOR command only.
Note:
    The REGION FILL COLOR command with no arguments sets the region fill color to default for all regions. The REGION FILL COLOR command with the word ALL before or after the specified color assigns that region fill color to all regions; thus REGION FILL COLOR BLACK ALL or REGION FILL COLOR ALL BLACK plots all region fills in black.
Note:
    The REGION, BAR, SPIKE, CHARACTER, and LINE switch all work independently of each other. That is, a plot point can be a line, a character, a spike a region, a bar or any combination of the above.
Related Commands: Applications:
    Presentation Graphics
Implementation Date:
    Pre-1987
    2021/11: Support for RGB color
Program 1:
     
    SKIP 25
    READ TEXAS.DAT X Y
    .
    FRAME OFF
    FRAME CORNER COORDINATES 5 5 95 95
    MULTIPLOT 2 2; MULTIPLOT CORNER COORDINATES 0 0 100 100
    REGION BASE POLYGON
    REGION FILL ON
    TITLE BLACK
    PLOT Y X
    REGION FILL COLOR G75
    TITLE G75
    PLOT Y X
    REGION FILL COLOR G50
    TITLE G50
    PLOT Y X
    REGION FILL COLOR G25
    TITLE G25
    PLOT Y X
    END OF MULTIPLOT
        
    plot generated by sample program
Program 2:
     
    skip 25
    read wright11.dat pressure angle wing
    let angled = distinct angle
    let nangle = size angled
    let wingd = distinct wing
    let nwing = size wingd
    .
    title case asis
    title offset 2
    title Response Variable = Pressure
    label case asis
    x1label Wing Type
    y1label uc()Alc()ngle
    y1label displacement 12
    tic offset units data
    x1limits 1 nwing
    major xtic mark number nwing
    minor xtic mark number 0
    xtic mark offset 0.8 0.8
    x1tic mark label format alpha
    x1tic mark label content 1 2 3 4 5 6 7 8 9 10 11 12 13 15 16 17
    y1limits 1 nangle
    major ytic mark number nangle
    minor ytic mark number 0
    y1tic mark offset 0.8 0.8
    y1tic mark label format alpha
    y1tic mark label content 0 2.5 5 7.5 10 12.5 15 17.5 20 25 30 35 40 45
    .
    let ylevel = data 10 20 30 40 50
    region fill on all
    region fill color   red orange yellow green cyan blue
    region border color red orange yellow green cyan blue
    line color          red orange yellow green cyan blue
    region fill rgb color   239 243 255  198 219 239  158 202 225 ...
                            107 174 214   49 130 189    8  81 156
    region border rgb color 239 243 255  198 219 239  158 202 225 ...
                            107 174 214   49 130 189    8  81 156
    line color              239 243 255  198 219 239  158 202 225 ...
                            107 174 214   49 130 189    8  81 156
    .
    tabulation mean plot pressure angle wing ylevel
    .
    box fill pattern solid
    box shadow hw 0 0
    .
    box fill color blue
    box fill rgb color 8 81 156
    box 86 90 90 86
    move 91 87; text > 50
    .
    box fill color cyan
    box fill rgb color 49 130 189
    box 86 86 90 82
    move 91 83; text 40 - 50
    .
    box fill color green
    box fill rgb color 107 174 214
    box 86 82 90 78
    move 91 79; text 30 - 40
    .
    box fill color yellow
    box fill rgb color 158 202 225
    box 86 78 90 74
    move 91 75; text 20 - 30
    .
    box fill color orange
    box fill rgb color 198 219 239
    box 86 74 90 70
    move 91 71; text 10 - 20
    .
    box fill color red
    box fill rgb color 239 243 255
    box 86 70 90 66
    move 91 67; text < 10
        
    plot generated by sample program

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Date created: 03/30/2021
Last updated: 03/30/2021

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