Forces the DataComm instances to update their internal states.
procedure NhlUpdateData ( dcomms [*] : graphic )
An array of ids of the DataComm classes to be updated.
This procedure is really only useful when the items in dcomms have the resource dcDelayCompute set to True. When this is True, DataComm instances are not notified of changes to their data items. This procedure tells each object in dcomms to check for changes in its data. These data were added with the NhlAddData or added using create or setvalues.