defDataAdd {simstudy}

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