MATLAB: Need help on designing plot

plotting

Dear all,

Can anyone help me with the below? Appreciate if anyone can help. Thank you!

Design an x-y plot for the following where the values of x are from 0 to 20π with a spacing of π/100.

a. y = x.sin(x)

b. z = x.cos(x)

c. Convert the above 2D into a 3D plot using z as the third axis

Regards,

Martin

defining the variable is the first step :

 x=0:pi/100:20*pi;

using element wise operation :

 y=x.*sin(x);
 z=x.*cos(x);

Three dimensional graph is given by :

 plo3t(x,y,z)

You can use fimplicit()

fun = @(x, y) y.*sin(2*x) - x.*cos(2*y);
fimplicit(fun, [-10 10 -10 10])

try this..

x=0:pi/100:20*pi;
y=x.*sin(x);
z=x.*cos(x);
plot(x,y);
plot(x,z);
plot3(x,y,z);
grid on;