rgbplot

Plot colormap

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Syntax

rgbplot(map)

Description

rgbplot(map) plots the red, green, and blue intensities of the specified colormap.

example

Examples

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Open Live Script

Plot the parula colormap, and display a colorbar as a visual reference.

rgbplot(parula)
hold on
colormap(parula)
colorbar('Ticks',[])

Figure contains an axes object. The axes object contains 3 objects of type line.

Open Live Script

Create a custom colormap and plot it. Then display a colorbar as a visual reference.

r = (0:.1:.9)';
g = r.^1.8;
b = r.^2.1;
mymap = [r g b]; 
rgbplot(mymap)
hold on
colormap(mymap)
colorbar('Ticks',[])

Figure contains an axes object. The axes object contains 3 objects of type line.

Input Arguments

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Colormap to plot, specified as a three-column matrix of RGB triplets. An RGB triplet is a three-element row vector whose elements specify the intensities of the red, green, and blue components of a color. The intensities must be in the range [0, 1]. For example, here is a colormap that contains five colors: 

map = [0.2 0.1 0.5
    0.1 0.5 0.8
    0.2 0.7 0.6
    0.8 0.7 0.3
    0.9 1 0];

This table lists the RGB triplet values for common colors.

ColorRGB Triplet
yellow[1 1 0]
magenta[1 0 1]
cyan[0 1 1]
red[1 0 0]
green[0 1 0]
blue[0 0 1]
white[1 1 1]
black[0 0 0]

Alternatively, you can create the matrix by calling one of the predefined colormap functions. Call the function as the input argument to the rgbplot function. For example, this command plots the parula colormap.

rgbplot(parula)

Data Types: double | single

Version History

Introduced before R2006a

See Also