6.2.7 Using the ore.indexApply Function

The ore.indexApply function executes the specified user-defined input function using data that is generated by the input function. It supports task-parallel execution, in which one or more R engines perform the same or different calculations, or task. The times argument to the ore.indexApply function specifies the number of times that the input function executes in the database. Any required data must be explicitly generated or loaded within the input function.

The syntax of the ore.indexApply function is the following:

ore.indexApply(times, FUN, ..., FUN.VALUE = NULL, FUN.NAME = NULL, FUN.OWNER = NULL,
               parallel = getOption("ore.parallel", NULL))

The ore.indexApply function returns an ore.list object or an ore.frame object.

Examples of the use of the ore.indexApply function are in the following topics:

"Simple Example of Using the ore.indexApply Function"
"Column-Parallel Use Case"
"Simulations Use Case"