To change the colormapping of a ribbon plot to be based on the z-direction instead of the x-direction, you can manipulate the 'CData' property of the surface objects created by the ribbon. By default, the ribbon plot uses x-values to determine the color mapping. By setting 'h(i).CData = z(:, i);', you use the z-values to determine the color of each ribbon. Ensure the 'CDataMapping' property is set to 'scaled' so that the colormap is scaled according to the range of z-values.
Here’s how you can achieve this:
[x, y] = meshgrid(-3:0.5:3, -3:0.1:3);
z = peaks(x, y);
h = ribbon(y, z);
% Set the colormap
colormap jet
% Adjust the CData property to use z-values for coloring
for i = 1:length(h)
h(i).CData = z(:, i);
end
set(h, 'CDataMapping', 'scaled');
xlabel('X')
ylabel('Y')
zlabel('Z')
% Add colorbar for reference
colorbar
