semdiag.run.eqs: Run EQS from R

Description

Calls an EQS script file from R, executes EQS, and imports the results into R. Basically it is a wrapper function of call.eqs and the subsequent read.eqs.

Usage

semdiag.run.eqs(EQSpgm, EQSmodel, serial, Rmatrix = NA, datname = NA, LEN = 2000000)
semdiag.call.eqs(EQSpgm, EQSmodel, serial, Rmatrix = NA, datname = NA, LEN = 2000000)

Value

Returns a list with the following objects:

success: TRUE if estimation was successful, FALSE otherwise
model.info: General model information
pval: p-values for various test statistics
fit.indices: Variuos fit indices
model.desc: Descriptive measures
Phi: Phi matrix
Gamma: Gamma matrix
Beta: Beta matrix
par.table: Parameter table (with standard errors)
sample.cov: Sample covariance matrix
sigma.hat: Model covariance matrix
inv.infmat: Inverse information matrix
rinv.infmat: Robust inverse information matrix
cinv.infmat: Corrected inverse information matrix
derivatives: First derivatives
moment4: Matrix with 4th moments
ssolution: Standardized elements
Rsquared: R-squared measures
fac.means: Factor means
var.desc: Descriptive measures for the variables (univariate statistics)
indstd: Independent variable standardization vector
depstd: Dependent variable standardization vector

Arguments

EQSpgm: String containing path where EQS is located (see details)
EQSmodel: String containing path where .eqs script file is located (see details)
serial: EQS serial number as integer value
Rmatrix: Optional matrix argument if data or covariances are stored in R
datname: If data is specified, a filename (string) must be provided for saving the data in text format (blank separated; see details)
LEN: Integer containing number of working array units. By default, it is 2000000 8 bytes units

Author

Patrick Mair, Eric Wu

Details

If the path in EQSpgm and EQSmodel contains a blank, single quotes and double quotes are required in argument. See EQSpgm argument in examples. The last statement in the EQSpgm argument refers to the name of the executable program file. Under Windows it is ".../WINEQS" (referring to WINEQS.exe), under Mac ".../MACEQS" and under Linux ".../EQS". When specifying the path, use slash instead of backslash.

The .ETS, .CBK and .ETP files are written in the directory where the .eqs file is located. Note that these 3 files must be in the same directory than the .eqs file.

The argument datname must match with the input data specified in the corresponding .eqs file. This option can be used for simulations: Generate data in R, run.eqs() on with the corresponding data argument, pick out the relevant return values.

The value list below provides objects for the full EQS output. If in EQS some objects are not computed, the corresponding values in R are NA.

References

Bentler, P. M. (1995). EQS Program Manual. Encino, CA: Multivariate Software Inc.