The apply mode

In the apply mode, the loop that is presented in the example for run is no longer necessary. The function should accept at least a parameter x containing the whole input row stored in a list. Its value is returned as the output row.

nz.mode: Equals apply.
nz.fun: Accepts the parameter x, along with additional parameters from nz.args.
nz.args: Contains a list with arguments for nz.fun (by default it is an empty list).
nz.shaper: Required if UDX output is defined as TABLE(ANY).
nz.shaper.args: Optional.
nz.shaper.list: Required if shaper is set to std.

An example of the apply setup:

nz.mode <- 'apply'
nz.fun <- function(x) {
return(sqrt(as.double(x[[1]])))
}

Each input row is passed as the function's sole argument. Since it can contain values of various data types, it is a list. Its elements can be accessed only by positional indices, no elements’ names are provided.