MATLAB Function Reference (Volume 2: Graphics)

Patch PropertiesButtonDownFcn stringButton press callback routine. A callback routine that executes whenever youpress a mouse button while the pointer is over the patch object. Define thisroutine as a string that is a valid MATLAB expression or the name of an M-file.The expression executes in the MATLAB workspace.CDatascalar, vector, or matrixPatch colors. This property specifies the color of the patch. You can specify colorfor each vertex, each face, or a single color for the entire patch. The wayMATLAB interprets CData depends on the type of data supplied. The data canbe numeric values that are scaled to map linearly into the current colormap,integer values that are used directly as indices into the current colormap, orarrays of RGB values. RGB values are not mapped into the current colormap,but interpreted as the colors defined. On true color systems, MATLAB uses theactual colors defined by the RGB triples. On pseudocolor systems, MATLABuses dithering to approximate the RGB triples using the colors in the figure’sColormap and Dithermap.The following two diagrams illustrate the dimensions of CData with respect tothe coordinate data arrays, XData, YData, and ZData. The first diagramillustrates the use of indexed color.2-325