how can i make graph i n which first i want function f(x,y) from user by input command but then i HAVE TO PLOT THAT FUNCTION f(x,y) 3D plot.

2 次查看（过去 30 天）

SYED 2024-4-5

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2103326-how-can-i-make-graph-i-n-which-first-i-want-function-f-x-y-from-user-by-input-command-but-then-i-ha

评论： Cris LaPierre 2024-4-5

how can i make graph i n which first i want function f(x,y) from user by input command but then i HAVE TO PLOT THAT FUNCTION f(x,y) 3D plot. I first convert the function in to inline function using inlne command then i don,t know how to plot 3d graph. because one error always showing conversion from inline to double is not possible

clear

clc

syms x y

a=input('Enter function f(x,y) = ');

b=inline(a);

x=[-2:0.1:2];

y=[-2:0.1:2];

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

x=X;

y=Y;

z=a;

mesh(z)

3 个评论
显示 1更早的评论隐藏 1更早的评论

Torsten 2024-4-5

Does this help ?

https://uk.mathworks.com/help/matlab/ref/surf.html

SYED 2024-4-5

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Cris LaPierre 2024-4-5

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2103326-how-can-i-make-graph-i-n-which-first-i-want-function-f-x-y-from-user-by-input-command-but-then-i-ha#answer_1437106

编辑：Cris LaPierre 2024-4-5

在 MATLAB Online 中打开

I think you are not using inline correctly. You likely need to use the following syntax.

f = inline(expr,arg1,arg2,…,argN)

There are many types of 3D plots. Since you haven't specified what type of 3D plot you want, here's an example using surf (surface example taken from here)

F = inline('Y.*sin(X) - X.*cos(Y)','X','Y');

[X,Y] = meshgrid(-5:.5:5);

Z = F(X,Y);

surf(X,Y,Z)

2 个评论
显示无隐藏无

SYED 2024-4-5

移动：Torsten 2024-4-5

clear

clc

syms x y

a=input('Enter function f(x,y) = ');

b=inline(a);

x=[-2:0.1:2];

y=[-2:0.1:2];

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

x=X;

y=Y;

z=a;

mesh(z)

Cris LaPierre 2024-4-5

You do not need to use syms.

请先登录，再进行评论。

类别

MATLAB Graphics 2-D and 3-D Plots Line Plots

在 Help Center 和 File Exchange 中查找有关 Line Plots 的更多信息

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by