Function of two variable for specific values of Z?

I want to draw my function of two variable so that the graph gives me Z values between -5 and 5. I used this code but it gives me the values of Z from 0 :

[X,Y] = meshgrid(0:.2:1, 0:.2:1);
Z = arrayfun(@mFunction, X, Y);
surf(X,Y,Z)

How I should proceed. Thanks!

[Star Strider]

Without knowing what ‘mFunction’ is, no Answer to your Question is possible.

[Stephen23]

This question has also been answered here:

http://www.mathworks.com/matlabcentral/answers/293862-error-value-must-be-a-vector-or-2d-array-of-numeric-type

Answer 1

[James Tursa]

Maybe define X and Y before you use them?

[X,Y] = meshgrid(0:.2:1, 0:.2:1);
Z = arrayfun(@mFunction, X, Y);
surf(X,Y,Z)

[amine&&]

Hello James, they are defined by :

[X,Y] = meshgrid(0:.2:1, 0:.2:1);

Thanks!

[James Tursa]

Yes, but you have this line after the arrayfun line in your code above ... i.e., you apparently use X and Y before you define them. I simply reversed the order of these lines in my post.

[amine&&]

Although i reserve the code the order of lines in your post i can't find the solution to my problem. Thanks!

[James Tursa]

Then I would echo Star's comment ... what is mFunction?

[amine&&]

Hello James. Thanks for your help. But i have found the solution. To set the plot Z-limits you simply need to use zlim, as follows :

>> [X,Y] = meshgrid(0:.2:1, 0:.2:1);
>> Z = 10*X.*Y;
>> surf(X,Y,Z)
>> zlim([-5,5])

[James Tursa]

Ah ... confusion in the wording. I (and probably other readers) assumed by these words " ...Z values between -5 and 5 ..." that you were actually talking about the Z values being plotted, not the Z axis limits.

[amine&&]

You are right James!