MATLAB: Smooth surface from scatter 3 plot

scatter3smooth surface

I have location data say L of ( X, Y, Z) of size (673266 X 3) and values at these locations estimated through statistical kriging say A(673266X1), I have plotted using scatter 3 plot as shown here. But I need to have a smooth surface like shown in the second figure. How to do that. Kindly help. I have tried surf, it does not work due to the difference in dimensions between L and A. Since I have used kriging for estimating the values, is it possible to get the smooth surface by not using any other interpolation method as it may lead to wrong results. Thanks in advance.

Best Answer

Read about griddata. You can provide your required (X,Y) and interpolate Z values on it. Also have a look on slice.

Related Solutions

MATLAB: Rank the point in scatter3d figure with different color

Now I have find a easy and beautiful method to do this

 scatter3(locationX,locationY,RSSValue, 'CData',RSSValue);

just with 'CData',RSSValue parameters, we can do this

MATLAB: Add contours to scatter3 plot

Contours can be drawn on a 2D slice in a 3D figure using contourslice.

I'm not sure what the contours are that you want to plot. I just specify some random contour in variable V.

Note that you are not projecting points at the wall, but at the location of the maximum. I fixed this by actually plotting at the limits.

x = mvnrnd(1, 3, 100);
y = mvnrnd(2, 3, 100);
z = mvnrnd(3, 3, 100);
scatter3 (x, y, z, 'filled')
hold on
xl = xlim;
yl = ylim;
zl = zlim;
xlim(xl); ylim(yl); zlim(zl); % fix the limits for if we rotate
scatter3 (0*x+xl(2), y, z, '.')
scatter3 (x, 0*y+yl(2), z, '.')
scatter3 (x, y, 0*z+zl(1), '.')
rotate3d on
[X,Y,Z]=meshgrid(round(xl(1)):round(xl(2)),round(yl(1)):round(yl(2)),round(zl(1)):round(zl(2)));
V = X.^2+Y.^2+Z.^2;
contourslice(X,Y,Z,V,xl(2),yl(2),[zl(1) zl(2)])
hold off

Best Answer

Related Solutions

MATLAB: Rank the point in scatter3d figure with different color

MATLAB: Add contours to scatter3 plot

Related Question