findFactorTotalCov: Find factor total covariance from regression coefficient...

In simsem: SIMulated Structural Equation Modeling

Description

Find factor total covariances from regression coefficient matrix, factor residual covariance matrix. The residual covaraince matrix might be derived from factor residual correlation, total variance, and error variance. This function can be applied for path analysis model as well.

Usage

findFactorTotalCov(beta, psi = NULL, corPsi = NULL, totalVarPsi = NULL, 
    errorVarPsi = NULL, gamma = NULL, covcov = NULL)

Arguments

beta	Regression coefficient matrix among factors
psi	Factor or indicator residual covariances. This argument can be skipped if factor residual correlation and either total variances or error variances are specified.
corPsi	Factor or indicator residual correlation. This argument must be specified with total variances or error variances.
totalVarPsi	Factor or indicator total variances.
errorVarPsi	Factor or indicator residual variances.
gamma	Regression coefficient matrix from covariates (column) to factors (rows)
covcov	A covariance matrix among covariates

Value

A matrix of factor (model-implied) total covariance

Author(s)

Sunthud Pornprasertmanit ([e-mail])

See Also

• findIndIntercept to find indicator (measurement) intercepts

• findIndMean to find indicator (measurement) total means

• findIndResidualVar to find indicator (measurement) residual variances

• findIndTotalVar to find indicator (measurement) total variances

• findFactorIntercept to find factor intercepts

• findFactorMean to find factor means

• findFactorResidualVar to find factor residual variances

• findFactorTotalVar to find factor total variances

Examples

path <- matrix(0, 9, 9)
path[4, 1] <- path[7, 4] <- 0.6
path[5, 2] <- path[8, 5] <- 0.6
path[6, 3] <- path[9, 6] <- 0.6
path[5, 1] <- path[8, 4] <- 0.4
path[6, 2] <- path[9, 5] <- 0.4
facCor <- diag(9)
facCor[1, 2] <- facCor[2, 1] <- 0.4
facCor[1, 3] <- facCor[3, 1] <- 0.4
facCor[2, 3] <- facCor[3, 2] <- 0.4
residualVar <- c(1, 1, 1, 0.64, 0.288, 0.288, 0.64, 0.29568, 0.21888)
findFactorTotalCov(path, corPsi=facCor, errorVarPsi=residualVar)

simsem documentation built on March 29, 2021, 1:07 a.m.