Re: Ndsolve

*To*: mathgroup at smc.vnet.net*Subject*: [mg84059] Re: [mg84023] Ndsolve*From*: DrMajorBob <drmajorbob at bigfoot.com>*Date*: Fri, 7 Dec 2007 06:58:20 -0500 (EST)*References*: <2887900.1197025122155.JavaMail.root@m35>*Reply-to*: drmajorbob at bigfoot.com

InterpolationFunction _is_ a numerical answer. For instance, execute: Clear[y] y = y /. First@ NDSolve[{y'[x] == Cos@Sin[x^2], y[0] == 0}, y, {x, 0, Pi}] y[0] y[1] y[Pi] Plot[y[x], {x, 0, Pi}] and the output is InterpolatingFunction[{{0.,3.14159}},<>] 0. 0.919768 2.52142 (and a plot) Bobby On Fri, 07 Dec 2007 02:01:10 -0600, DrunkenButterfly <darkladymacbeth at hotmail.com> wrote: > I'm confused about the "interpolation" thing. Why if I have some diff eq > with boundary conditions NdSolve doesn't give me a numerical solution? > And suppose I have > > y'[x]== f[x] > with y[a]== b as a condition (a,b any numbers) > > How can I find f[0], for example? (Generalizing, how can I find f[c], > where c is a number?) > > Thanks to everyone! And please, help me :( > > -- DrMajorBob at bigfoot.com