Plotting with true colors in an uneven grid

I would like to plot data 1) on an uneven grid, with 2) a pre-defined RGB color for each grid cell, not an indexed colormap. pcolor allows 1) and image allows 2). But is there a function that lets me do both?

Here is an example:

    %Data
    x = 1:3; %Both pcolor and image
    y = [1 2 4 8]; %Both
    z = [1:12 repmat(NaN,1,8)]; %z data for pcolor
    z = reshape(z,5,4);
    [xmesh,ymesh] = meshgrid([x 4],[y 10]); %Mesh for pcolor
    c = reshape(lines(12),4,3,3); %Colors for image
    %Pcolor
    figure;
    pcolor(xmesh,ymesh,z);
    title('pcolor: correct grid');
    %Image
    figure; 
    image(x,y,c);
    set(gca,'YDir','Normal');
    title('image: correct colors');

I realize that I could index my data relative to a colormap containing only the colors I want, but is there a more direct solution?

Answer 1

[Sean de Wolski]

pcolor is just creating a surface so you could do this explicitly yourself and then view it in two dimensions:

surf(xmesh,ymesh,z,c);view(2)  %c is color!

You will have to figure out how you want to handle NaN data though.

[Ellen]

Thanks, that solved the problem!

Answer 2

[Image Analyst]

Would Steve Eddins's im2html() help? http://blogs.mathworks.com/steve/2012/06/02/making-an-html-table-of-pixel-values-with-colored-cells/