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I've used NDSolve to get an InterpolatingFunction that solves a certain difeq. I want to see the behavior of this function on a couple different scales, so I want to use some sort of Log Plot.

For a regular function in a 3D plot, I would do something like

Plot3D[F[10^x,10^t],{x,1,5},{t,1,5}]

but this gives me error messages for the interpolating function:

InterpolatingFunction::dmval: Input value {1,1} lies outside the range of data in the interpolating function. Extrapolation will be used.

A blank plot is shown.

The actual argument, i.e., 10^1, is clearly in the range of data, even if (1,1) is not. Is there a way around this issue?

Sorry I didn't post actual code, the difeq is complicated and I thought it would only muddle things. If it would help, I'll try to create a simple example.

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  • $\begingroup$ More code would be helpful. Please format. $\endgroup$ – Young Jul 25 '16 at 21:00
  • $\begingroup$ I don't think we need to see the NDSolve command, you could post the interpolating function itself. If F is your interpolating function, evaluate CopyToClipboard[F], then go to pastebin.com and paste the definition there and give the link here. $\endgroup$ – Jason B. Jul 25 '16 at 21:03