Repeater objects can be used with the * operator to repeat
things multiple time using a different syntax and different output
format from that used by, for example, replicate().
n:Object of class "numeric" indicating how many times to repeat something.
cull:Object of class "function" that culls the output from each repetition.
mode:Object of class "character" indicating the output mode
('default', 'data.frame', 'matrix', 'vector', or 'list'). For most purposes 'default' (the default)
should suffice.
algorithm:an algorithm number.
parallel:a logical indicating whether to attempt parallel execution.