book_4_58.m

Mesh plot after surface fit using loess2
if ~exist('newzEw', 'var')
    load galaxy

    %  loess surface fit parameters
    alpha = 0.25;
    lambda = 2;

    % Smooth and grid the data
    XI = -25:5:25;
    YI = (-45:5:45)';
    nx = length(XI);
    ny = length(YI);
    newx = repmat(XI,ny,1);
    newy = repmat(YI,1,nx);
    newzEw = loess2(EastWest,NorthSouth,Velocity,newx,newy,alpha,lambda,1);
end

mesh(newx,newy,newzEw);
xlabel('East-West')
ylabel('North-South')
zlabel('Velocity')
title('Galaxy')
view(150,25)
colormap jet