matlab中如何根据散点画出等高线

A=[1.486,3.059,0.1;2.121,4.041,0.1;2.570,3.959,0.1;3.439,4.396,0.1;

4.505,3.012,0.1;3.402,1.604,0.1;2.570,2.065,0.1;2.150,1.970,0.1;

1.794,3.059,0.2;

2.121,

3.615,0.2;2.570,3.473,0.2;3.421,

4.160,0.2;

4.271,3.036,0.2;3.411,1.876,0.2;2.561,2.562,0.2;2.179,2.420,0.2;

2.757,

3.024,0.3;3.439,3.970,0.3;

4.084,3.036,0.3;3.402,2.077,0.3;

2.879,

3.036,0.4;3.421,3.793,0.4;3.953,3.036,0.4;3.402,2.219,0.4;

3.000,3.047,0.5;3.430,3.639,0.5;3.822,3.012,0.5;3.411,2.385,0.5;

3.103,3.012,0.6;3.430,3.462,0.6;3.710,3.036,0.6;3.402,2.562,0.6;

3.224,3.047,0.7;3.411,3.260,0.7;3.542,3.024,0.7;3.393,2.763,0.7];

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

scatter(x,y,5,z)%散点图

figure

[X,Y,Z]=griddata(x,y,z,linspace(1.486,4.271)',linspace(1.604,4.276),'v4');%插值

pcolor(X,Y,Z);shading interp%伪彩色图

figure,contourf(X,Y,Z) %等高线图

x=xlsread('C:\Documents and Settings\Administrator\桌面\cumcm2011A附件_数

据.xls',1,'B4:B322');

y=xlsread('C:\Documents and Settings\Administrator\桌面\cumcm2011A附件_数

据.xls',1,'C4:C322');

z=xlsread('C:\Documents and Settings\Administrator\桌面\cumcm2011A附件_数

据.xls',2,'I4:I322');

[X,Y,Z]=griddata(x,y,z,linspace(0,28654)',linspace(0,18449),'v4');%插值

subplot(1,2,1),contourf(X,Y,Z) %等高线图

tri=delaunay(x,y);

subplot(1,2,2),trisurf(tri,x,y,z) %空间立体图

xlabel('x')

ylabel('y')

zlabel('元素Zn的含量')

title('元素Zn在整个城市的空间分布')

x=xlsread('C:\Documents and Settings\Administrator\桌面\cumcm2011A附件_数

据.xls',1,'B4:B322');

y=xlsread('C:\Documents and Settings\Administrator\桌面\cumcm2011A附件_数

据.xls',1,'C4:C322');

z=xlsread('C:\Documents and Settings\Administrator\桌面\cumcm2011A附件_数

据.xls',1,'D4:D322');

[X,Y,Z]=griddata(x,y,z,linspace(0,28654)',linspace(0,18449),'v4'); %插值

[C,h] = contour(X,Y,Z);

clabel(C,h);

xlabel('x/m')

ylabel('y/m')

zlabel('海拔高度')

title('城市地貌等高线图')

x=xlsread('C:\Documents and Settings\Administrator\桌面\cumcm2011A附件_数据.xls',1,'B4:B322');

y=xlsread('C:\Documents and Settings\Administrator\桌面\cumcm2011A附件_数据.xls',1,'C4:C322');

z=xlsread('C:\Documents and Settings\Administrator\桌面\cumcm2011A附件_数据.xls',2,'B4:B322');

[X,Y,Z]=griddata(x,y,z,linspace(0,28654)',linspace(0,18449),'v4'); %插值[C,h] = contour(X,Y,Z);

clabel(C,h);

% axis([xmin xmax ymin ymax])

% subplot(1,2,1),

%contour(X,Y,Z) %等高线图

% subplot(1,2,1),

%[C,h]=contour(interp2(Z,4)) %等高线图

%text_handle=clabel(C,h)

%set(text_handle,'backgroundColor',[1 1 .6],...'EdgeColor',[.7 .7 .7])

% subplot(1,2,2),

%surf(Z)

% tri=delaunay(x,y);

% subplot(1,2,2),trisurf(tri,x,y,z) %空间立体图

xlabel('x/m')

ylabel('y/m')

%zlabel('元素As的含量()')

title('元素As在该城区的空间分布')