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Re: Saving PDE Derivatives

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  • Subject: [mg126484] Re: Saving PDE Derivatives
  • From: "Kevin J. McCann" <kjm at>
  • Date: Mon, 14 May 2012 01:34:27 -0400 (EDT)
  • Delivered-to:
  • References: <jonm8b$gd5$>

You have an error in the code below. y[x,0]==0 should be something else.


On 5/13/2012 3:01 AM, deltafrog wrote:
> Hi,
> I'm using NDSolve, in order to solve a PDE and I won't to evaluate the results plus the derivatives of the result. Example:
> NDSolve[{Derivative[0,1][u][x,t]-Derivative[1,0][u][x,t]-Derivative[1,0][v][x,t]==0, y[x,0]==0, Derivative[1,0][u][0,t], Derivative[1,0][v][0,t]},{u,v}, {x,0,10}, {t,0,10}]
> When I want to evaluate the results I get results for u, v, u_t, and v_t, but I can't evaluate u_x nor v_x. These obviously have to be calculated somehow? How can I tell mathematica 8 to save the results?

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