Need help on designing plot

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

Answer 1

[Youssef Khmou]

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)

[KSK]

Youssef Khmou Thank you very much! its work! i got two more question i posted today. hope you can help me. =) Really appreciated!