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: <j06avh$nj8$1@smc.vnet.net>
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...