extract.fun: Extract functions, libraries and global variables to be...

In peperr: Parallelised Estimation of Prediction Error

Extract functions, libraries and global variables to be loaded onto a compute cluster

Description

Automatic extraction of functions, libraries and global variables employed passed functions. Designed for peperr call, see Details section there.

Usage

extract.fun(funs = NULL)

Arguments

funs	list of function names.

Details

This function is necessary for compute cluster situations where for computation on nodes required functions, libraries and variables have to be loaded explicitly on each node. Avoids loading of whole global environment which might include the unnecessary loading of huge data sets.

It might have problems in some cases, especially it is not able to extract the library of a function that has no namespace. Similarly, it can only extract a required library if it is loaded, or if the function contains a require or library call.

Value

list containing

packages	vector containing quoted names of libraries
functions	vector containing quoted names of functions
variables	vector containing quoted names of global variables

See Also

peperr

Examples

# 1. Simplified example for illustration
## Not run: 
library(CoxBoost)
a <- function(){
# some calculation
}

b<-function(){
# some other calculation
x <- cv.CoxBoost()
# z is global variable
y <- a(z)
}

# list with packages, functions and variables required for b:
extract.fun(list(b))

# 2. As called by default in peperr example
extract.fun(list(fit.CoxBoost, aggregation.pmpec))

## End(Not run)

peperr documentation built on March 31, 2023, 7:34 p.m.