read.cefa: Read and Write Files Produced by or for CEFA

In FAiR: Factor Analysis in R

Description

Compatability functions between R and Comprehensive Exploratory Factor Analysis (CEFA) Version 2.0 by Michael W. Browne, Robert Cudeck, Krishna Tateneni, and Gerhald Mels.

Usage

read.cefa(file)
read.CEFA(file)
write.cefa(file, FAobject)
write.CEFA(file, FAobject)

Arguments

file	Character string giving the path to the file to be imported, possibly "" to print the file to the screen.
FAobject	object of FA-class produced by Factanal under EFA

Details

read.cefa does not support importing a matrix of factor loadings, (Datatype 3 in CEFA) because the file does not include enough information to be useful to FAiR. Instead, import the covariance matrix (Datatype 1 in CEFA) or better the raw dataset (Datatype 2 or 4 in CEFA) and use Factanal to reestimate the model.

In contrast, the only export method that is currently supported is that for preliminary factor loadings in a EFA. read.CEFA is just an alias for read.cefa and similarly for write.CEFA.

These functions have not been tested very much.

Value

If a raw dataset is imported, read.cefa returns a dataframe with columns as variables. Such a dataframe can be passed to the data or x argument of make_manifest. If a covariance matrix is imported, read.cefa returns a two-element list with the following items:

cov	The covariance matrix
n.obs	Number of observations

This list can be passed to the covmat argument of make_manifest. write.cefa does not produce anything but writes a file to the specified location.

Author(s)

Ben Goodrich

References

CEFA is available for Windows (but also runs under Wine in Linux) from http://faculty.psy.ohio-state.edu/browne/software.php

See Also

read.triangular imports a triangular covariance matrix, the foreign library has functions to import files created by SPSS, SAS, etc., read.table imports delimited text files and read.fwf imports fixed-width text files.

Examples

  ## Not run: 
    OrgComm <- read.cefa(file = file.path("Program Files", "CEFAtool" 
                                          "OrgComm.inp"))
  
## End(Not run)

FAiR documentation built on May 29, 2017, 6:08 p.m.