how to plot the path of circular beam oscillation welding?

hey guys i want to use matlab plot this picture(b)

here is my code:

A=1;

f=50;

vf=0.015;

time=linspace(0,2*pi);

x=A*cos(time*2*f*pi)+vf*time;

y=A*sin(time*2*f*pi);

plot(x,y);

Answer 1

[Alan Stevens]

Like this?

A=1;
f=50;
vf=0.02;
time = linspace(0,100,500);
x0 = vf*time;
theta = 2*pi*f*time;
x=A*cos(theta)+x0;
y=A*sin(theta);
plot(x,y);
axis equal