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is an option for various numerical computation and plotting functions that gives an expression to evaluate whenever functions derived from the input are evaluated numerically.
  • The option setting is normally given as EvaluationMonitor:>expr. The :> is used instead of -> to avoid expr being immediately evaluated.
  • Whenever expr is evaluated, all variables in the numerical computation are assigned their current values. Block[{var1=val1, ...}, expr] is effectively used.  »
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