求助：matlab处理大量只有三维点坐标信息云数据并绘图

林海听涛

原始数据：
700865.716330 5662549.105570 1113.565220
700865.796330 5662549.205570 1113.515220
700866.746330 5662550.005570 1113.655220
700866.786330 5662551.385570 1113.765220
700866.816330 5662552.755570 1113.885220
700866.886330 5662553.295570 1113.945220
700866.856330 5662551.925570 1113.795220
700866.826330 5662550.565570 1113.635220
700866.786330 5662549.185570 1113.515220
700867.756330 5662549.575570 1113.575220
700867.786330 5662550.975570 1113.655220
700867.866330 5662554.895570 1114.445220
700867.916330 5662554.625570 1114.275220
700867.856330 5662551.845570 1114.105220
700867.836330 5662550.635570 1113.615220
700867.806330 5662549.265570 1113.495220
700868.956330 5662549.335570 1113.465220
700868.976330 5662550.685570 1113.675220
700869.096330 5662556.185570 1114.185220
700869.126330 5662557.535570 1114.365220
700869.236330 5662557.835570 1114.175220
700869.206330 5662556.425570 1114.145220
700869.176330 5662555.005570 1114.085220
700869.086330 5662550.895570 1113.605220
700869.066330 5662549.505570 1113.485220
700870.256330 5662550.265570 1113.585220
700870.306330 5662553.025570 1113.855220
700870.366330 5662555.805570 1114.065220
700870.396330 5662557.185570 1114.205220
700870.416330 5662558.535570 1114.395220
700870.486330 5662557.965570 1114.155220
700870.456330 5662556.565570 1114.065220
700870.376330 5662552.415570 1113.715220
700870.346330 5662550.915570 1113.855220
700870.326330 5662549.625570 1113.495220
700871.536330 5662551.265570 1113.585220
700871.586330 5662554.005570 1113.885220
700871.636330 5662556.795570 1114.055220
700871.756330 5662558.075570 1114.135220
700871.736330 5662556.695570 1113.985220
700871.686330 5662553.885570 1113.835220
700871.656330 5662552.455570 1113.815220
700872.956330 5662554.575570 1114.105220
700873.006330 5662557.445570 1114.145220
700873.026330 5662558.685570 1114.565220
700873.126330 5662557.815570 1114.105220
700873.096330 5662556.435570 1113.965220
700874.416330 5662557.995570 1114.125220
700874.536330 5662557.435570 1114.205220
700875.886330 5662555.865570 1113.925220
700875.906330 5662557.245570 1114.065220
700875.926330 5662558.625570 1114.195220
700875.966330 5662561.575570 1114.105220
700875.996330 5662563.055570 1114.045220
700876.016330 5662564.495570 1114.095220
700876.126330 5662571.805570 1113.965220
700876.146330 5662573.225570 1114.025220
700876.166330 5662574.665570 1114.025220
700876.186330 5662576.115570 1114.015220
700876.316330 5662576.145570 1113.885220
700876.296330 5662574.725570 1113.825220
700876.276330 5662573.295570 1113.785220
700876.256330 5662571.845570 1113.805220
700876.236330 5662570.365570 1113.885220
700876.156330 5662564.505570 1114.035220
700876.136330 5662563.095570 1113.935220
700876.116330 5662561.595570 1114.045220
700876.096330 5662560.125570 1114.055220
700876.076330 5662558.665570 1114.065220
700876.066330 5662557.235570 1114.015220
700876.046330 5662555.895570 1113.785220
700876.026330 5662554.455570 1113.785220
700877.336330 5662550.865570 1113.265220
700877.356330 5662552.205570 1113.485220
700877.376330 5662553.655570 1113.455220
700877.386330 5662555.045570 1113.565220
700877.406330 5662556.425570 1113.725220
700877.416330 5662557.865570 1113.735220
700877.436330 5662559.265570 1113.825220
700877.456330 5662560.735570 1113.785220
700877.476330 5662562.215570 1113.755220
700877.496330 5662563.655570 1113.765220
700877.516330 5662565.135570 1113.715220
700877.526330 5662566.565570 1113.765220
700877.546330 5662568.025570 1113.735220
700877.596330 5662572.315570 1113.905220
........................
怎样处理如此庞大的数据？根据高度区间不同，对应不同颜色...

wxy_whu

[x,y]=meshgrid(1:100,1:100);  %生成网格点

z=griddata(data(:,1),data(:,2),data(:,3),x,y,'v4');%你的数据得插值成网格型数据。
%z=griddata(linspace(min(data(:,1)),max(data(:,1)),200),linspace(min(data(:,2)),max(data(:,2)),200),'v4');%

%z=interp2(data(:,1),data(:,2),data(:,3),x,y);
%P=peaks(100);P(1:100,1:100)=NaN; % 镂空
%z=z*sin(z);
%surfc(P);colormap(summer)
figure,surf(x,y,z);

%light('position',[50,-10,5]),lighting flat
%plot3(x,y,z,'b-',x,y,z,'bd')
%TriScatteredInterp(x,y,z);
%mesh(x,y,z);
%interp3(data,3,'spline');
%hidden off;
%hold on pcolor(z);
%P(0:100,0:100)=NaN*ones(0,100);
%meshz(P)
%meshc(x,y,z);
%meshz(x,y,z);
%shading interp;
%grid on;
title('Three dimension forest');
xlabel('X(m)'), ylabel('Y(m)'), zlabel('Z(m)'),
colormap, colorbar;
axis([0 100 0 100 0 20])
colormap gray;
hold on;
shading interp