How to obtain a surface curve plane located on specific heights and with a different vector of color representation?

level is a (120,4) matrix. The columns correspond from 1 to 4 to X coordinate, Y coordinate, Z coordinate and a C scalar value.

When I use this code:

x = level(:,1);
y = level(:,2);
z = level(:,3);
xv = linspace(min(level(:,1)), max(level(:,1)), 20);
yv = linspace(min(level(:,2)), max(level(:,2)), 20);
[X,Y] = meshgrid(xv, yv);
Z = griddata(x,y,z,X,Y);

hold on
surf(X, Y, Z);
grid on
shading interp
axis equal
colorbar

I obtain this plot:

I would like to obtain a surface which is located exactly as I located this one, following the Z values of hight, but that the colors represent C values and not Z.

The colors of the surf plot should be folliwng this:

Any ideas about how to do it?

Answer 1

[darova]

Use cdata property

[x,y,z] = peaks(20);
c = sphere(19);
surf(x,y,z,'cdata',c)

[Philippe Corner]

Yes man, but my c value is a (120,1) vector. I can change linspace from 20 to 120, but how could i create a 120,120 matrix fro c value? corresponding to my initial c vector? Not sure

[Philippe Corner]

if i use your suggestion

surf(X, Y, Z,'cdata',c);
grid on
shading interp
axis equal
colorbar

I obtain a correct colorbar assocaited to my c values like:

But it doesnt plot surf, Probably because I have a problem with size vector:

x = level(:,1); %size: (120,1)
y = level(:,2); %size: (120,1)
z = level(:,3); %size: (120,1)
c = level(:,4); %size: (120,1)

xv = linspace(min(level(:,1)), max(level(:,1)), 120); %size: (1,120)
yv = linspace(min(level(:,2)), max(level(:,2)), 120); %size: (1,120)
[X,Y] = meshgrid(xv, yv); % X size: (120,120) and Y size: (120,120)
Z = griddata(x,y,z,X,Y); %size: (120,120)

hold on
surf(X, Y, Z,'cdata',c); % c size should be (120,120) but it still being 120,1. 
%% Im not sure how to create a (120,120) c value from my data that makes sense.
grid on
shading interp
axis equal
colorbar

Please let me know if i made myself clear with my confussion. thanks for your help

[darova]

do the same to your color vector

[Philippe Corner]

Thanks a lot for your help!