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NDSolve Interpolating Function Range too small!

• To: mathgroup at smc.vnet.net
• Subject: [mg26344] NDSolve Interpolating Function Range too small!
• From: flashboltzmann at my-deja.com
• Date: Tue, 12 Dec 2000 02:54:54 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

I'm using NDSolve to numerically solve three very complicated second
order differential equation. When NDSolve does the calculation though
the interpolating function always has a range in the 10^-30 something
range. This is useless when I try to plot the solutions to the equation
because I need it on a range of up to 100. How do I tweak mathematica
(or my equation) to get a decent range from the interpolating function?
Also, when I am plotting is there any way to tell mathematica not to
extrapolate a solution if it hits an undefined point?


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