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gray

Gray colormap array

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  • Gray colormap

Syntax

c = gray
c = gray(m)

Description

c = gray returns the gray colormap as a three-column array with the same number of rows as the colormap for the current figure (gcf). If no figure exists, then the number of rows is equal to the default length of 256. Each row in the array contains the red, green, and blue intensities for a specific color. The intensities are in the range [0,1], and the color scheme looks like this image.

Sample of the gray colormap

example

c = gray(m) returns the colormap with m colors.

example

Examples

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Open Live Script

Plot a surface and assign the gray colormap.

surf(peaks);
colormap('gray');

Figure contains an axes object. The axes object contains an object of type surface.

Get the gray colormap array and reverse the order. Then apply the modified colormap to the surface.

c = gray;
c = flipud(c);
colormap(c);

Figure contains an axes object. The axes object contains an object of type surface.

Open Live Script

Get a downsampled version of the gray colormap containing only twenty colors. Then display the contours of a paraboloid by applying the colormap and interpolated shading.

c = gray(20);
[X,Y] = meshgrid(-10:1:10);
Z = X.^2 + Y.^2;
surf(X,Y,Z);
colormap(c);
shading interp;

Figure contains an axes object. The axes object contains an object of type surface.

Input Arguments

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Number of colors, specified as a nonnegative integer. The default value of m is the number of colors in the current figure's colormap. If no figure exists, the default value is 256.

Data Types: single | double

Version History

Introduced before R2006a

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See Also

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