findFactorTotalCov: Find factor total covariance from regression coefficient matrix, factor residual covariance

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

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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 (psunthud@gmail.com)

See Also

Examples

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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)

Questions? Problems? Suggestions? or email at ian@mutexlabs.com.

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