sem: standardizedCoefficients – R documentation

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standardizedCoefficients

Standardized Coefficients for Structural Equation Models

Description

These functions calculate standardized regression coefficients for structural equation models. The function stdCoef is simply an abbreviation for standardizedCoefficients.

Usage

standardizedCoefficients(object, ...)
## S3 method for class 'sem'
standardizedCoefficients(object, 
    digits = getOption("digits"), oneheaded = TRUE, twoheaded = TRUE, ...)
## S3 method for class 'msem'
standardizedCoefficients(object, ...)

stdCoef(...)

Arguments

`object`	an object of class `sem` or `msem` returned by the `sem` function.
`digits`	number of digits for printed output.
`oneheaded`	standardize path coefficients? Default is `TRUE`.
`twoheaded`	standardize variances and covariances? Default is `TRUE`.
`...`	arguments to pass down.

Value

Returns a data frame with the coefficients, labelled both by parameter names and by arrows in the path diagram for the model. The msem (multigroup) method computes and prints the standardized coefficients for each group; it does not return a useful result.

Author(s)

John Fox jfox@mcmaster.ca and Adam Kramer

References

Bollen, K. A. (1989) Structural Equations With Latent Variables. Wiley.

Examples

# In the first example, readMoments() and specifyModel() read from the
# input stream. This example cannot be executed via example() but can be entered
# at the command prompt. The example is repeated using file input;
# this example can be executed via example(). 
    ## Not run: 
# Duncan, Haller, and Portes peer-influences model

R.DHP <- readMoments(diag=FALSE, names=c("ROccAsp", "REdAsp", "FOccAsp", 
                "FEdAsp", "RParAsp", "RIQ", "RSES", "FSES", "FIQ", "FParAsp"))
    .6247     
    .3269  .3669       
    .4216  .3275  .6404
    .2137  .2742  .1124  .0839
    .4105  .4043  .2903  .2598  .1839
    .3240  .4047  .3054  .2786  .0489  .2220
    .2930  .2407  .4105  .3607  .0186  .1861  .2707
    .2995  .2863  .5191  .5007  .0782  .3355  .2302  .2950
    .0760  .0702  .2784  .1988  .1147  .1021  .0931 -.0438  .2087
            
model.dhp <- specifyModel()
    RParAsp  -> RGenAsp, gam11,  NA
    RIQ      -> RGenAsp, gam12,  NA
    RSES     -> RGenAsp, gam13,  NA
    FSES     -> RGenAsp, gam14,  NA
    RSES     -> FGenAsp, gam23,  NA
    FSES     -> FGenAsp, gam24,  NA
    FIQ      -> FGenAsp, gam25,  NA
    FParAsp  -> FGenAsp, gam26,  NA
    FGenAsp  -> RGenAsp, beta12, NA
    RGenAsp  -> FGenAsp, beta21, NA
    RGenAsp  -> ROccAsp,  NA,     1
    RGenAsp  -> REdAsp,  lam21,  NA
    FGenAsp  -> FOccAsp,  NA,     1
    FGenAsp  -> FEdAsp,  lam42,  NA
    RGenAsp <-> RGenAsp, ps11,   NA
    FGenAsp <-> FGenAsp, ps22,   NA
    RGenAsp <-> FGenAsp, ps12,   NA
    ROccAsp <-> ROccAsp, theta1, NA
    REdAsp  <-> REdAsp,  theta2, NA
    FOccAsp <-> FOccAsp, theta3, NA
    FEdAsp  <-> FEdAsp,  theta4, NA

sem.dhp <- sem(model.dhp, R.DHP, 329,
    fixed.x=c('RParAsp', 'RIQ', 'RSES', 'FSES', 'FIQ', 'FParAsp'))
standardizedCoefficients(sem.dhp) 
	
## End(Not run)
# The following example can be executed via example():

etc <- system.file(package="sem", "etc") # path to data and model files
   
(R.DHP <- readMoments(file=file.path(etc, "R-DHP.txt"),
				diag=FALSE, names=c("ROccAsp", "REdAsp", "FOccAsp", 
                "FEdAsp", "RParAsp", "RIQ", "RSES", "FSES", "FIQ", "FParAsp")))
(model.dhp <- specifyModel(file=file.path(etc, "model-DHP.txt")))
(sem.dhp <- sem(model.dhp, R.DHP, 329,
    fixed.x=c('RParAsp', 'RIQ', 'RSES', 'FSES', 'FIQ', 'FParAsp')))
standardizedCoefficients(sem.dhp)

sem

Structural Equation Models

v3.1-11

GPL (>= 2)

Authors

John Fox [aut, cre], Zhenghua Nie [aut], Jarrett Byrnes [aut], Michael Culbertson [ctb], Saikat DebRoy [ctb], Michael Friendly [ctb], Benjamin Goodrich [ctb], Richard H. Jones [ctb], Adam Kramer [ctb], Georges Monette [ctb], R-Core [ctb]

Initial release

2020-05-16