Applying FindRoot to Interpolating Functions

*To*: mathgroup at christensen.cybernetics.net*Subject*: [mg1897] Applying FindRoot to Interpolating Functions*From*: adler at acf2.nyu.edu (adler)*Date*: Mon, 14 Aug 1995 01:44:40 -0400*Organization*: New York University

Hi, I need some help with the Interpolating Function, created by NDSolve. I am using it to solve two second order coupled ordinary differential equations. It does so easily and I have no troble the solutions, x[t] and y[t]. Now I need to find the first value of t where x[t] == y[t]. I tried to use NRoots and FindRoot, but they did not work. I can do the problem by inspection, looking at where the curves, x[t] vs t and y[t] vs t intersect, but I am looking for something more accurate. Any help would be greatly appreciated. Thanks, Andre Adler -- New York University Department of Physics adler at acf2.nyu.edu