derivation.add: Add a derivation

In tobyjohnson/gtx: Genetics ToolboX

Description

Provides a consistent interface for adding a derivation.

Usage

derivation.add(derivations, targets, types, deps, data, fun, aept.list, verbose = TRUE)

Arguments

derivations	A data frame of derivation rules
targets	Names of derived variables, whitespace delimited
types	Types of derived variables, in sense of storage.mode(target), whitespace delimited
deps	Names of dependency data frames, whitespace delimited
data	Parseable text of code to extract data
fun	Parseable text of code to derive variables
aept.list	Not used, for guessing derivation rules
verbose	Whether to print progress messages

Details

Read the code or see the examples.

Author(s)

Toby Johnson [e-mail]

Examples

## Not run: 
clindata <- derivation.add("path/to/clinical/export/")
data(derivations.standard)
derivations.custom <-
  derivation.add(derivations.standard,
                 targets = 'vsanal.SBP.mean4wk',
                 types = 'double',
                 deps = 'vitals',
                 data = 'subset(vsanal, VSTEST == "Systolic BP~(mmHg)" &
                                        ATTYPE == "On-therapy" &
                                        VSACTDY >= 1 & VSACTDY <= 35)',
                 fun = 'safe(mean, VSSTRESN)')
gxvars <- clinical.derive(clindata, derivations.custom)
summary(gxvars)

## End(Not run)

tobyjohnson/gtx documentation built on Aug. 30, 2019, 8:07 p.m.