Description Usage Arguments Author(s) See Also Examples
Some standard methods for objects of class polycor
, produced by
polychor
and polyserial
, including print
, summary
, coef
, and vcov
. The summary
method simply invokes the print
method.
1 2 3 4 5 6 7 8 | ## S3 method for class 'polycor'
print(x, digits = max(3, getOption("digits") - 3), ...)
## S3 method for class 'polycor'
summary(object, ...)
## S3 method for class 'polycor'
coef(object, correlation=TRUE, thresholds=TRUE, ...)
## S3 method for class 'polycor'
vcov(object, correlation=TRUE, thresholds=TRUE, ...)
|
x, object |
an object of class |
digits |
number of significant digits to be printed. |
correlation |
return the estimated correlation or sampling variance of the correlation. |
thresholds |
return the estimated thresholds or sampling variances/covariances of the thresholds. |
... |
pass arguments from |
John Fox jfox@mcmaster.ca
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | if(require(mvtnorm)){
set.seed(12345)
data <- rmvnorm(1000, c(0, 0), matrix(c(1, .5, .5, 1), 2, 2))
x <- data[,1]
y <- data[,2]
cor(x, y) # sample correlation
}
if(require(mvtnorm)){
x <- cut(x, c(-Inf, .75, Inf))
y <- cut(y, c(-Inf, -1, .5, 1.5, Inf))
print(polychor(x, y, ML=TRUE, std.err=TRUE),
digits=3) # polychoric correlation, ML estimate
}
if(require(mvtnorm)){
coef(polychor(x, y, ML=TRUE, std.err=TRUE))
}
if(require(mvtnorm)){
vcov(polychor(x, y, ML=TRUE, std.err=TRUE))
}
|
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