Create 3-D shaded surface plot for specific values of Z?

I want to draw my function of two variable so that the displayed graph gives me Z values between -5 and 5.

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

What command I should add? Thanks!

[Stephen23]

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