defDataAdd: Add single row to definitions table that will be used to add...

In simstudy: Simulation of Study Data

Add single row to definitions table that will be used to add data to an existing data.table

Description

Add single row to definitions table that will be used to add data to an existing data.table

Usage

defDataAdd(
  dtDefs = NULL,
  varname,
  formula,
  variance = 0,
  dist = "normal",
  link = "identity"
)

Arguments

dtDefs	Name of definition table to be modified. Null if this is a new definition.
varname	Name (string) of new variable
formula	An R expression for mean (string)
variance	Number
dist	Distribution. For possibilities, see details
link	The link function for the mean, see details

Value

A data.table named dtName that is an updated data definitions table

See Also

[distributions]

Examples

# New data set

def <- defData(varname = "xNr", dist = "nonrandom", formula = 7, id = "idnum")
def <- defData(def, varname = "xUni", dist = "uniform", formula = "10;20")

dt <- genData(10, def)

# Add columns to dt

def2 <- defDataAdd(varname = "y1", formula = 10, variance = 3)
def2 <- defDataAdd(def2, varname = "y2", formula = .5, dist = "binary")
def2

dt <- addColumns(def2, dt)
dt

simstudy documentation built on Nov. 23, 2023, 1:06 a.m.