MplusAutomation (version 0.8)

update.mplusObject: Update an Mplus model object

Description

This is a method for updating an Mplus model object. It takes an Mplus model object as the first argument, and then optionally any sections to update. There are two ways to update a section using a formula interface. ~ "new stuff" will replace a given section with the new text. Alternately, you can add additional text using ~ + "additional stuff". Combined these let you replace or add to a section.

Usage

# S3 method for mplusObject
update(object, ...)

Arguments

object

An object of class mplusObject

…

Additional arguments to pass on

Value

An (updated) Mplus model object

Examples

# NOT RUN {
example1 <- mplusObject(MODEL = "mpg ON wt;",
  usevariables = c("mpg", "hp"), rdata = mtcars)
x <- ~ "ESTIMATOR = ML;"
str(update(example1, rdata = iris))
str(update(example1, ANALYSIS = x))
str(update(example1, MODEL = ~ "wt ON hp;"))
str(update(example1, MODEL = ~ . + "wt ON hp;"))
str(update(example1, ANALYSIS = x, MODEL = ~ . + "wt ON hp;"))

## check that use variables can be updated & over ridden
str(update(example1, usevariables = c("mpg", "hp", "cyl")))

# test to make sure . in Mplus code does not cause problems
str(update(example1, ANALYSIS = x, MODEL = ~ . + "wt ON hp*.5;"))
rm(example1, x)
# }