making numbers ramp

First, let me say that I'm a beginner with Max/MSP, so sorry if this is an obvious question:

I have numbers that change from .2 to .9 to 1.6 to 2.3 and back down. I want the output instead of going directly from, say, .2 to .9 or 1.6 to .2, to ramp between these numbers over a short period of time. I have messed with the line object a bit, but I can't seem to figure out how to make it so the number state is checked, then, when it changes, a ramp occurs.

Any thoughts?

Thanks.