Point coordinates to integer

Hey I have a live audio feed coming in from vvvv, that is moving a point along the z-axis. I want the changing of height to control a radius on a sweep function I have set up. How do I turn the z value coordinate into a value the radius input can read.

I've decomposed the point coordinates, but the integer value always shows as 0.

If you need me to clarify I can post what I have, but I figured it might be something easy I'm missing.

(I know I could take the vvvv output into a text file, but I'm new to vvvv, and controlling a point is what I can do now).

Thanks in advance