Chapter 4: Programming in Matlab - College of the Redwoods

Section 4.1 Logical Arrays 297
Draw the surface, adjust the orientation,
and turn the box on for depth.
mesh(x,y,z)
view(130,30)
box on
39. Define the anonymous function.
f=@(x,y) 11-2*x+2*y;
Set up the grid.
Open a new figure window, replot,
and adjust the view so that the
eye stares down the z-axis directly at
the xy-plane.
figure
mesh(x,y,z)
view(0,90)
x=linspace(-3,3,40);
y=x;
[x,y]=meshgrid(x,y);
Evaluate the function at each (x, y)
pair in the grid.
z=f(x,y);
Determine where x > −1 and
set all entries in z equal to NaN where
this contraint is not satisfied.
z=f(x,y);
k=(x+y=-2);
z(~k)=NaN;