matlab 三维画图总结
1.画函数的三维图，如：Z(X,Y)=2*X.*exp(-X.^2-Y.^2)+1;
close all;[X,Y]=meshgrid(-2:0.5:2,-2:0.5:2);%生成坐标轴Z=2*X.*exp(-X.^2-Y.^2)+1;%Z是X,Y的函数%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%num=0;num=num+1;subplot(2,3,num);plot3(X,Y,Z);axis([-3 3 -3 3 0 2]);%限定显示的范围xlabel('x轴');%x轴坐标ylabel('y轴');%y轴坐标zlabel('z轴');%z轴坐标title('http://blog.csdn.net/nuptboyzhb/ figure(1)');%标题%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%num=num+1;subplot(2,3,num);mesh(X,Y,Z);axis([-3 3 -3 3 0 2]);%限定显示的范围xlabel('x轴');%x轴坐标ylabel('y轴');%y轴坐标zlabel('z轴');%z轴坐标title('http://blog.csdn.net/nuptboyzhb/ figure(2)');%标题%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%num=num+1;subplot(2,3,num);meshc(X,Y,Z);axis([-3 3 -3 3 0 2]);%限定显示的范围xlabel('x轴');%x轴坐标ylabel('y轴');%y轴坐标zlabel('z轴');%z轴坐标title('http://blog.csdn.net/nuptboyzhb/ figure(3)');%标题%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%num=num+1;subplot(2,3,num);surf(X,Y,Z);axis([-3 3 -3 3 0 2]);%限定显示的范围xlabel('x轴');%x轴坐标ylabel('y轴');%y轴坐标zlabel('z轴');%z轴坐标title('http://blog.csdn.net/nuptboyzhb/ figure(4)');%标题%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%num=num+1;subplot(2,3,num);meshz(X,Y,Z);axis([-3 3 -3 3 0 2]);%限定显示的范围xlabel('x轴');%x轴坐标ylabel('y轴');%y轴坐标zlabel('z轴');%z轴坐标title('http://blog.csdn.net/nuptboyzhb/ figure(5)');%标题%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%num=num+1;subplot(2,3,num);surf(X,Y,Z);hold on;stem3(X,Y,Z,'r');%画竖线axis([-3 3 -3 3 0 2]);%限定显示的范围xlabel('x轴');%x轴坐标ylabel('y轴');%y轴坐标zlabel('z轴');%z轴坐标title('http://blog.csdn.net/nuptboyzhb/ figure(6)');%标题
2.画矩阵的三维图
clc;clear all;close all;X=[0 1 2 3 4 5 6 7 8 9];Y=[0 1 2 3 4 5 6 7 8 9];for i=1:1:length(X) for j=1:1:length(Y) Z(i,j)=mod(i*j*rand(1),9); endend%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%num=0;num=num+1;subplot(2,3,num);plot3(X,Y,Z);axis([0 9 0 9 0 9]);%限定显示的范围xlabel('x轴');%x轴坐标ylabel('y轴');%y轴坐标zlabel('z轴');%z轴坐标title('http://blog.csdn.net/nuptboyzhb/ figure(1)');%标题%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%num=num+1;subplot(2,3,num);mesh(X,Y,Z);axis([0 9 0 9 0 9]);%限定显示的范围xlabel('x轴');%x轴坐标ylabel('y轴');%y轴坐标zlabel('z轴');%z轴坐标title('http://blog.csdn.net/nuptboyzhb/ figure(2)');%标题%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%num=num+1;subplot(2,3,num);meshc(X,Y,Z);axis([0 9 0 9 0 9]);%限定显示的范围xlabel('x轴');%x轴坐标ylabel('y轴');%y轴坐标zlabel('z轴');%z轴坐标title('http://blog.csdn.net/nuptboyzhb/ figure(3)');%标题%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%num=num+1;subplot(2,3,num);surf(X,Y,Z);axis([0 9 0 9 0 9]);%限定显示的范围xlabel('x轴');%x轴坐标ylabel('y轴');%y轴坐标zlabel('z轴');%z轴坐标title('http://blog.csdn.net/nuptboyzhb/ figure(4)');%标题%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%num=num+1;subplot(2,3,num);meshz(X,Y,Z);axis([0 9 0 9 0 9]);%限定显示的范围xlabel('x轴');%x轴坐标ylabel('y轴');%y轴坐标zlabel('z轴');%z轴坐标title('http://blog.csdn.net/nuptboyzhb/ figure(5)');%标题%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%num=num+1;subplot(2,3,num);surf(X,Y,Z);hold on;stem3(X,Y,Z,'r');%画竖线axis([0 9 0 9 0 9]);%限定显示的范围xlabel('x轴');%x轴坐标ylabel('y轴');%y轴坐标zlabel('z轴');%z轴坐标title('http://blog.csdn.net/nuptboyzhb/ figure(6)');%标题
3.画矩阵的颜色深度图
我自己编写的一个函数：graycolor.m
%filename：graycolor.m%郑海波 2013-01-31%http://blog.csdn.net/nuptboyzhb/%原理：灰度图像的伪彩色处理%值越大，显示的颜色越蓝，越小，显示的颜色越红！%参数：newbuf必须使二维数组或矩阵function graycolor(newbuf);min_n=min(min(newbuf));max_n=max(max(newbuf));newbuf=newbuf./(max_n-min_n)*255;[M N]=size(newbuf);for i=1:1:M for j=1:1:N R(i,j)=GrayColorR(newbuf(i,j)); G(i,j)=GrayColorG(newbuf(i,j)); B(i,j)=GrayColorB(newbuf(i,j)); endendimg(1:1:M,1:1:N,1)=R(1:M,1:N);img(1:1:M,1:1:N,2)=G(1:M,1:N);img(1:1:M,1:1:N,3)=B(1:M,1:N);imshow(uint8(img));function r=GrayColorR(gray)r=0;if gray>=170 r=255;endif gray>=128&&gray<=170 r=255/42*(gray-128);endreturn;function g=GrayColorG(gray)g=0;if gray>=84&&gray<=170 g=255;endif gray<=84 g=255/84*gray;endif gray>=170&&gray<=255 g=255/85*(255-gray);endreturn;function b=GrayColorB(gray)b=0;if gray<=84 b=255;endif gray>=84&&gray<=128 b=255/44*(128-gray);endreturn;
函数的调用：
[X,Y]=meshgrid(-2:0.01:2,-2:0.01:2);%生成坐标轴Z=2*X.*exp(-X.^2-Y.^2)+1;%Z是X,Y的函数graycolor(Z);title('http://blog.csdn.net/nuptboyzhb/');%标题
另外，在\matlab2009a\toolbox\matlab\demos\graf3d.m中文件，有更加详细的介绍。界面如下：
