Matlab Error (Z must be a matrix, not a scalar or vector.)?

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GURPREET
GURPREET 2012-7-27
评论： Kolenchenko 2024-3-5
Hello
I was trying to plot using the following code but i get this error. Can someone help me please? Thank You
x = -2.5:.1:2.5;
y = -2.5:.1:2.5;
[X,Y] = meshgrid(x,y);
z = 2*sin(x.*y);
mesh(x,y,z)
grid on
hold on
Error using mesh (line 76) Z must be a matrix, not a scalar or vector.

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采纳的回答

George Papazafeiropoulos
编辑：George Papazafeiropoulos 2012-7-29
Is this what you want?
x = -2.5:.1:2.5;
y = -2.5:.1:2.5;
[X,Y] = meshgrid(x,y);
Z = 2*sin(X.*Y);
mesh(X,Y,Z)
grid on
hold on
George Papazafeiropoulos

更多回答（2 个）

Miro
Miro 2012-7-27
编辑：Miro 2012-7-27
ah you mixed up the capitals i guess. use ur meshgrid for your z like
z = 2*sin(X.*Y);
mesh(X,Y,z)
shahariar Ryehan
shahariar Ryehan 2022-6-12
编辑：shahariar Ryehan 2022-6-12
I got the same error. Please help.
%variable declare
syms x;
syms t;
%putting the value
a=1;
b=-2;
c=-1;
alpha=1;
y=0;
%vartheta equation
vartheta = @(x, t)((a/alpha)*x.^alpha)+((b/alpha)*y^alpha)+c*t;
%delta
delta=-(2*c)/(b*a^2);
%mesh plot
x = -3:.1:3;
y = -3:.1:3;
[X,Y] = meshgrid(x,t);
%main function
Z=@(vartheta,delta)(-(2*(c^2)*((tanh(sqrt(-delta).*vartheta)).^2))/(b*delta*a^3));
mesh(X,Y,Z)
grid on
hold on
Result:
Error using surf (line 71)
Z must be a matrix, not a scalar or vector.
Error in M3_1_29_3 (line 30)
surf(v, 'edgecolor', 'none')

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