the question asks to subplot the contours any idea how?

x = linspace (-1,1); y = linspace (-1,1); [X, Y] = meshgrid(x,y); Z=7*sin(pi.*X).*cos(3*pi.*X);

surf(X,Y,Z ) hold on contour(X,Y,Z) hold off

rotate3d on

the question asks to subplot the contours any idea how?

Answer 1

[KSSV]

x = linspace (-1,1); 
y = linspace (-1,1); 
[X, Y] = meshgrid(x,y); 
Z=7*sin(pi.*X).*cos(3*pi.*X);
subplot(211)
surf(X,Y,Z ) 
subplot(212)
contour(X,Y,Z) 

rotate3d on

[dulanga]

hi the second subplot just has a bunch of lines?

[KSSV]

For your data the contour lines would be straight.