matlab画三维空间劣弧,matlab 三维空间画图总结

Posted 2022-03-12 文青xx

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);

end

end

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

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));

end

end

img(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;

end

if gray>=128&&gray<=170

r=255/42*(gray-128);

end

return;

function g=GrayColorG(gray)

g=0;

if gray>=84&&gray<=170

g=255;

end

if gray<=84

g=255/84*gray;

end

if gray>=170&&gray<=255

g=255/85*(255-gray);

end

return;

function b=GrayColorB(gray)

b=0;

if gray<=84

b=255;

end

if gray>=84&&gray<=128

b=255/44*(128-gray);

end

return;

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：