Question

I have a matrix that stores x, y and z values as so:

{x1, y1, z1},
{x2, y2, z2},
{x3, y3, z3},
etc...

I need to interpolate the data, and plot in on a 2d graph, with color representing the z value. (example)

Any ideas?

Thanks!

Answer 1

Something like griddata might help you to interpolate:

x = vector(:,1);
y = vector(:,2);
z = vector(:,3);

% Settings
xres = 800; % Resolution, the higher, the smoother
yres = 800;         
cm = 'default'; % Colormap

% Axes Limits
xmin = min(x); 
ymin = min(y);
xmax = max(x); 
ymax = max(y); 
xi = linspace(xmin, xmax, xres);
yi = linspace(ymin, ymax, yres);

% Figure
myfig = figure('Position', [200 200 800 600]);

rotate3d off
[XI, YI] = meshgrid(xi, yi);
ZI = griddata(x, y, z, XI, YI, 'cubic');
mesh(XI,YI,ZI);

than you just need to change the view of it to only display a certain plane for a fixed value of z