updateDefAdd: Update definition table

In kgoldfeld/simstudy: Simulation of Study Data

Update definition table

Description

Updates row definition table created by functions defDataAdd and defReadAdd. (For tables created using defData or defRead use updateDef.)

Usage

updateDefAdd(
  dtDefs,
  changevar,
  newformula = NULL,
  newvariance = NULL,
  newdist = NULL,
  newlink = NULL,
  remove = FALSE
)

Arguments

dtDefs	Definition table that will be modified
changevar	Name of field definition that will be changed
newformula	New formula definition (defaults to NULL)
newvariance	New variance specification (defaults to NULL)
newdist	New distribution definition (defaults to NULL)
newlink	New link specification (defaults to NULL)
remove	If set to TRUE, remove definition (defaults to FALSE)

Value

A string that represents the desired formula

Examples

# Define original data

defs <- defData(varname = "w", formula = 0, variance = 3, dist = "normal")
defs <- defData(defs, varname = "x", formula = "1 + w", variance = 1, dist = "normal")
defs <- defData(defs, varname = "z", formula = 4, variance = 1, dist = "normal")

# Define additional columns

defsA <- defDataAdd(varname = "a", formula = "w + x + z", variance = 2, dist = "normal")

set.seed(2001)
dt <- genData(10, defs)
dt <- addColumns(defsA, dt)
dt

# Modify definition of additional column

defsA <- updateDefAdd(dtDefs = defsA, changevar = "a", newformula = "w+z", newvariance = 1)

set.seed(2001)
dt <- genData(10, defs)
dt <- addColumns(defsA, dt)
dt

kgoldfeld/simstudy documentation built on April 14, 2024, 3:13 a.m.