initVarLink {lavaSearch2}

Normalize var1 and var2

Description

Convert var1 and var2 from formula or covariance to character.

Usage

initVarLink(
  var1,
  var2,
  rep.var1 = FALSE,
  format = "list",
  Slink = c(lava.options()$symbols[1], "~"),
  Scov = lava.options()$symbols[2]
)

initVarLinks(var1, format = "list", ...)

Arguments

var1

[character or formula] the exogenous variable of the new link or a formula describing the link.

var2

[character] the endogenous variable of the new link. Disregarded if the argument var1 is a formula.

rep.var1

[logical] should var1 be duplicated to match var2 length. Only active if format = "list".

format

[character] should the name of the variable be returned (format = "list"), a vector of character formula (format = "txt.formula"), or a list of formula (format = "formula").

Slink

[character] the symbol for regression link.

Scov

[character] the symbol for covariance link.

...

argument to be passed to initVarLink.

Value

See argument format.

Examples

initVarLink(y ~ x1)
initVarLink("y ~ x1")
initVarLink(y ~ x1 + x2)
initVarLink("y ~ x1 + x2")
initVarLink(y ~ x1 + x2, rep.var1 = TRUE)
initVarLink(y ~ x1 + x2, rep.var1 = TRUE, format = "formula")
initVarLink(y ~ x1 + x2, rep.var1 = TRUE, format = "txt.formula")
initVarLink("y", "x1", format = "formula")

initVarLink("y ~ x1:0|1")

initVarLinks(y ~ x1)
initVarLinks("y ~ x1")
initVarLinks(c("y ~ x1","y~ x2"))
initVarLinks(c(y ~ x1,y ~ x2))
initVarLinks(c("y ~ x1","y ~ x2"), format = "formula")
initVarLinks(c(y ~ x1,y ~ x2), format = "formula")
initVarLinks(c("y ~ x1","y~ x2"), format = "txt.formula")
initVarLinks(c(y ~ x1,y ~ x2), format = "txt.formula")