print.polycor {polycor} | R Documentation |
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.
## 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
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)) }