summary.D3mirt {D3mirt}

Summary Method for S3 Objects of Class D3mirt

Description

The summary method for the D3mirt() function.

Usage

## S3 method for class 'D3mirt'
summary(object, ..., digits = 4)

Arguments

object

A S3 object of class D3mirt.

...

Additional arguments.

digits

The number of digits shown per estimate. The default is digits = 4.

Value

Tables containing a and d parameters, multidimensional discrimination (MDISC), multidimensional item difficulty (MDIFF), direction cosines, and degrees for vector angles for items. If constructs were used in the estimation process, the summary function will also show tables for direction cosines, degrees for construct vectors, and directional discrimination (DDISC) parameters.

Author(s)

Erik Forsberg

Examples

## Not run: 
# Load data
data("anes0809offwaves")
x <- anes0809offwaves
x <- x[, 3:22] # Remove columns for age and gender

# Call D3mirt() with constructs
con <- list(c(1,2,3,4,5,6,7,8,9,10),
            c(11,12,13,14),
            c(15,17,18,19,20))
mod <- D3mirt(x, modid = c("W7Q3", "W7Q20"), con.items = con)

# Call to summary
summary(mod)

#' # Call to summary rounded off to 2 digits
summary(mod, digits = 2)

## End(Not run)