How do I plot a 3D graph of function that I have taken as input from the user?
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I want to write a code, where when I enter a function will return me a 3D plot of that function. This is the code I've written.
clc;
close all;
syms x y
f = input("f(x,y)");
x1=-5:1:5;
y1=x1';
[X1,Y1]=meshgrid(x1,y1);
Z1=subs(subs(f,x,X1),y,Y1);
surf(X1,Y1,z1);
But, every time I run it, it shows me an error.
f(x,y) - x*y (FunctionI passed as input)
Error using surf
Data dimensions must agree.
Error in project_prac4 (line 9)
surf(X1,Y1,z1);
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Walter Roberson
am 19 Feb. 2023
z1 = subs(f, {x, y}, {X1, Y1});
You can only get away with subs(subs()) with scalars or with vectors with different orientations. You need simultaneous substitution for arrays.
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