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What to do with derivative #684

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YingboMa opened this issue Dec 5, 2020 · 1 comment
Closed

What to do with derivative #684

YingboMa opened this issue Dec 5, 2020 · 1 comment

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@YingboMa
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YingboMa commented Dec 5, 2020

Should we define ModelingToolkit.derivative(f, x) = expand_derivatives(Differential(x)(f))? It's technically breaking, but I doubt the current behavior of not using chain rules is desirable.
@ChrisRackauckas
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The current derivative is "symbolic rules", not the derivative function. We should definitely change this because it's a confusing trap for most users.

@YingboMa YingboMa mentioned this issue Jan 8, 2021
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@ChrisRackauckas @YingboMa