Hey everyone!

I have been tring to generate a profile on matlab. I have written the parametric equation and plotted it.

I tried my code for a known set of values and obtained a plot which doesnt look exactly like it should, I wonder what's wrong?

My code-

`phi=linspace(0,2*pi,100000);N_ask='N';dt_ask='dt';R_ask='R';E_ask='E';Rr_ask='Rr';N=input(N_ask)dt=input(dt_ask)R=input(R_ask)E=input(E_ask)Rr=input(Rr_ask)r3=E*N;si=atan(sin((N+1).*phi)/(R./r3-cos((N+1).*phi)));x2c=R.*cos(phi)+(Rr+dt).*cos(phi+si)+E.*cos(N.*phi);y2c=R.*sin(phi)+(Rr+dt).*sin(phi+si)-E.*sin(N*phi);plot(x2c,y2c)`

The output that I got for N=8, dt=0, R=32, E=3.5, Rr=4-

But what it really should look like –

## Best Answer