Input a Covariance, Correlation, or Raw Moment Matrix
Description
This functions makes it simpler to input covariance, correlation, and rawmoment
matrices to be analyzed by the sem
function. The matrix
is input in lowertriangular form on as many lines as is convenient,
omitting the abovediagonal elements. The
elements on the diagonal may also optionally be omitted, in which case they
are taken to be 1.
Usage
1 2  read.moments(file = "", diag = TRUE,
names = as.character(paste("X", 1:n, sep = "")))

Arguments
file 
The (quoted) file from which to read the model specification,
including the path to the file if it is not in the current directory. If

diag 
If 
names 
a character vector containing the names of the variables, to label the rows and columns of the moment matrix. 
Value
Returns a lowertriangular matrix (i.e., with zeroes above the main diagonal)
suitable for input to sem
.
Author(s)
John Fox jfox@mcmaster.ca
See Also
sem
Examples
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16  ## Not run:
R.DHP < read.moments(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
R.DHP
## End(Not run)
