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You can set the Absolute or Relative ODE solver tolerances in Matlab with the options structure from an odeset command. But how do I find the default values for the different ODE solvers?

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According to the odeset documentation in R2018a,

  • relative tolerance has a default of $10^{-3}$
  • absolute tolerance has a default of $10^{-6}$

You should also be able to see them by running odeset command without any arguments.

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