MATLAB Function Reference (Volume 2: Graphics)

Image PropertiesA true color specification for CData requires an m-by-n-by-3 array of RGBvalues. The first page contains the red component, the second page the greencomponent, and the third page the blue component of each element in theimage. RGB values range from 0 to 1. The following picture illustrates therelative dimensions of CData for the two color models.Indexed ColorsCDataTrue ColorsBlueGreenRedCDataIf CData has only one row or column, the height or width respectively is alwaysone data unit and is centered about the first YData or XData elementrespectively. For example, using a 4-by-1 matrix of random data,C = rand(4,1);image(C,'CDataMapping','scaled')axis image2-236