I have some random signal (for example `sin`

signal) with the time scale.

```
t=0:0.1:2*pi
y=sin(t)
plot(t,y)
```

Now I want to draw this signal on this circle. So the time vector actually becomes an envelope of the circle. Envelope of the circle represents "y = 0" in cartesian coordinate system.

Here is an example of what I expect the output to look like:

Thank in advanced!