May be we need to dig further into this.
What I understand is that you have v = f(x), where f is a known function. Then you have a series of v values and you want to find the corresponding x's.
So the problem is to find the inverse function of f, so that x = g(v). If g cannot be formally established, your problem becomes a root solving problem (zero), and you are looking for the x solution of f(x)-v = 0.
There are a number of vi's in LV to do this : seen in the "Analyze>Mathematics>Zeroes" subpalette...
Hope this helps. Give some feed back here !
CC
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...