Re: Inverse of Interpolating Function?
- To: mathgroup at smc.vnet.net
- Subject: [mg120400] Re: Inverse of Interpolating Function?
- From: Jay Bee <jiri.bocan at gmail.com>
- Date: Thu, 21 Jul 2011 06:54:12 -0400 (EDT)
- References: <email@example.com>
On Jul 20, 11:34 am, gonzorascal <dj... at duke.edu> wrote: > Hello All, > > I am working with an Interpolating Function of an oscillating solution (time series) to a differential equation. I am trying to find the period and pulse width of the oscillation. To do this I would like to have an inverse of my function y[t] (so I would have t[y]). I realize this function would be multivalued (that's what I want to find the period). I am not having success using Mathematica's InverseFunction or Reduce commands. Does anyone have any experience or suggestions with this sort of thing (either finding Inverse Interpolating Functions or another method for period and pulse width)? Thank you. > > -GR So, when you will find out the period, compute sufficient number of points with the help of this interpolation function, e.g., as a Table, change coordinates, and interpolate again... Of course, if you know exact formula, worth using it...