Question

求助用matlab画三维图

x=[0.7,0.75,0.8,0.85,0.9]; x取这5个数
y=[0.03,0.04,0.05,0.06,0.07]; y取这5个数
z=[9.5869,9.8443,9.6682,9.4436,9.6937;
9.6794,9.4763,9.2275,9.2439,9.5396;
9.6342,9.6472,9.7845,9.4961,9.2596;
9.5531,9.5781,9.4625,9.6549,9.4775;
9.0017,9.6543,9.5531,9.3018,9.6387]; 当x=0.7，y=0.03时候z=9.5869；x=0.7，y=0.04时z=9.8443一次类推，这样画一个三维图。谢谢啦

Answer 1

> x=[0.7,0.75,0.8,0.85,0.9];   

y=[0.03,0.04,0.05,0.06,0.07]; 

z=[9.5869,9.8443,9.6682,9.4436,9.6937;

    9.6794,9.4763,9.2275,9.2439,9.5396;

    9.6342,9.6472,9.7845,9.4961,9.2596;

    9.5531,9.5781,9.4625,9.6549,9.4775;

    9.0017,9.6543,9.5531,9.3018,9.6387]; 

>> [X,Y]=meshgrid(x,y)

X =

    0.7000    0.7500    0.8000    0.8500    0.9000

    0.7000    0.7500    0.8000    0.8500    0.9000

    0.7000    0.7500    0.8000    0.8500    0.9000

    0.7000    0.7500    0.8000    0.8500    0.9000

    0.7000    0.7500    0.8000    0.8500    0.9000

Y =

    0.0300    0.0300    0.0300    0.0300    0.0300

    0.0400    0.0400    0.0400    0.0400    0.0400

    0.0500    0.0500    0.0500    0.0500    0.0500

    0.0600    0.0600    0.0600    0.0600    0.0600

    0.0700    0.0700    0.0700    0.0700    0.0700

surf(X,Y,z)  %做三维曲面图。

追问

就是画出的图不带颜色可以吗？（x和y要写成矩阵，而且要对应z，这个已经ok啦！）谢谢啊

追答

先用[X,Y]=meshgrid(x,y)构造平面网格矩阵
再用mesh(X,Y,z) %做三维网格图就可以了。

Answer 2

ezmesh('(x+y)/(x-y)');

追问

额，看不懂什么意思，才接触MATLAB