Re: NDSolve and error
- To: mathgroup at smc.vnet.net
- Subject: [mg92556] Re: [mg92545] NDSolve and error
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Sun, 5 Oct 2008 06:05:14 -0400 (EDT)
- Reply-to: hanlonr at cox.net
You typed y[t] rather than y[x]
Bob Hanlon
---- dodatki at poczta.fm wrote:
=============
Hello!
Lately I wrote simple code in Mathematica
sol[p_] :=
NDSolve[{Sqrt[
1 + (y'[t])^2] == (x^(p - 1) + (y[x])^(p - 1)*y'[x])/(x^p +
y[x]^p)^(1 - 1/p), y[1] == 6}, y, {x, 1, 4}]
but when I typed sol[2] the following kind of error was shown:
NDSolve::"ndnum": "Encountered non-numerical value for a derivative at
\
\!\(x\) == \!\(4.587812868332132`*^-296\)."
May I know what I'm doing wrong? Or how can I improve that code to
work correctly?
Thank you in advance
John
--
Bob Hanlon