MATLAB: Surfnorm function shows error

Question

Hi,

I am trying to use surfnorm function to calculate the nor of 3D meshgrid. But the use of the functions shows error "Y and Z must be the same size as X." which I do not understand why!!

The size of X,Y,Z are the same even though the document in mathwork says it is possible to use meshgrid as an input as attached in the questions

x = linspace(-1,1,10);
y = x;
z = x;
[X,Y,Z]=meshgrid(x,y,z);
figure,
surfnorm(X,Y,Z);

Answer 1

X, Y, and Z must be 2D matrices. Z is a function of X and Y in this case. The following shows an example of how to use it properly

x = linspace(-1,1,10);
y = x;
[X,Y]=meshgrid(x,y);
Z = X+Y; % Z=X+Y is chosen as an example to show Z is a function of X and Y
figure,
surfnorm(X,Y,Z);