I have a basic Pop Network, with Pop Source which give me the point age attribute and I have Pop Wind node in which I want to set up the Air resistance parameter for each point depending on current age of the point.

How to write this expression in Air Resistance channel?
Thanks!

I'm unable to see your images, but this is simply done with a little VEX in the Pop Wind node.
You can hover over any channel to see the VEX name. Don't have Houdini open in front of me, but I believe Air Resistance is airresist. Just hit the "Use VEXpressions" toggle to enable the VEX code.

So in VEX you can simply type

Only thing to note is there's no @ infront of the airresist variable. From there, it's just regular vex code.
Depending on what you want, you can normalize or fit the @age between some values and add/multiply it with the airresist variable.

As Tronotrond said, and it can be convenient to multiply the existing air resistance value by your remapped age so that you can still change the value easily.

Something like


will allow you to still control the amount of air resistance with the slider.

Thanks guys!
While my post was being moderated I found the following solution for my situation: