matlab 三维直线怎么画

Posted 2023-05-12

matlab三维直线画法：
可以用plot3函数来画。它与plot函数用法十分相似，其调用格式为：
plot3(x1,y1,z1,选项1,x2,y2,z2,选项2,…,xn,yn,zn,选项n)
例如：
t=0:pi/100:20*pi;
x=sin(t);
y=cos(t);
z=t.*sin(t).*cos(t);
plot3(x,y,z);
title(\'Line in 3-D Space\');
xlabel(\'X\');ylabel(\'Y\');zlabel(\'Z\')
matlab简介：
MATLAB是美国MathWorks公司出品的商业数学软件，用于算法开发、数据可视化、数据分析以及数值计算的高级技术计算语言和交互式环境，主要包括MATLAB和Simulink两大部分。
MATLAB是matrix&laboratory两个词的组合，意为矩阵工厂（矩阵实验室）。是由美国mathworks公司发布的主要面对科学计算、可视化以及交互式程序设计的高科技计算环境。它将数值分析、矩阵计算、科学数据可视化以及非线性动态系统的建模和仿真等诸多强大功能集成在一个易于使用的视窗环境中，为科学研究、工程设计以及必须进行有效数值计算的众多科学领域提供了一种全面的解决方案，并在很大程度上摆脱了传统非交互式程序设计语言（如C、Fortran）的编辑模式，代表了当今国际科学计算软件的先进水平。 参考技术A plot3(x,y,z);
x,y,z都是数组！追问

能不能详细点 举个例子...

追答

clc;
clear
n=2;
t=linspace(1,10*pi,n)
x=sin(t);
y=cos(t);
z=t
plot3(x,y,z)

本回答被提问者采纳

matlab画三维空间劣弧,matlab 三维空间画图总结

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：