This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)


Refresh[expr, opts]
represents an object whose value in a Dynamic should be refreshed at times specified by the options opts.
Refresh[expr, None]
specifies that the value of expr should never automatically be refreshed.
  • The following options can be given:
TrackedSymbolsAutomaticsymbols whose changes trigger an update
UpdateIntervalInfinitytime interval at which to do updates
  • When Refresh[expr, opts] is evaluated inside a Dynamic, it gives the current value of expr, then specifies criteria for when the Dynamic should be updated.
  • When one Refresh appears inside another, the innermost Refresh takes precedence.
  • The setting UpdateInterval->t specifies that updating should be done at least every t seconds.
New in 6