print.itemresp: Formatting Item Response Data

Description

Fine control for formatting and printing "itemresp" data objects.

Usage

# S3 method for itemresp
format(x, sep = c(",", ":"), brackets = TRUE,
    abbreviate = NULL, mscale = TRUE, labels = FALSE,
    width = getOption("width") - 7L, ...)
  # S3 method for itemresp
print(x, quote = FALSE, ...)

Arguments

x: an object of class "itemresp".
sep: character. A character of length 2 (otherwise expanded/reduced) for separating responses and items, respectively.
brackets: logical or character. Either a logical (Should brackets be wrapped around all responses for a single subject?) or a character of length 2 with opening and ending symbol.
abbreviate: logical or integer. Should scale labels be abbreviated? Alternatively, an integer with the desired abbreviation length. The default is some heuristic based on the length of the labels.
mscale: logical. Should mscale values be used for printing? If FALSE, integers 0, 1, ... are used.
labels: logical. Should item labels be displayed?
width: integer or logical. Maximal width of the string for a subject. If FALSE no maximal width is set.
...: arguments passed to other functions.
quote: logical. Should quotes be printed?

Details

The print method just calls format (passing on all further arguments) and then prints the resulting string.

Examples

Run this code

## item responses from binary matrix
x <- cbind(c(1, 0, 1, 0), c(1, 0, 0, 0), c(0, 1, 1, 1))
xi <- itemresp(x)
## change mscale
mscale(xi) <- c("-", "+")
xi

## flexible formatting
## no/other brackets
print(xi, brackets = FALSE)
print(xi, brackets = c(">>", "<<"))

## include item labels (with different separators)
print(xi, labels = TRUE)
print(xi, labels = TRUE, sep = c(" | ", ": "))

## handling longer mscale categories
mscale(xi) <- c("disagree", "agree")
print(xi)
print(xi, mscale = FALSE)
print(xi, abbreviate = FALSE)
print(xi, abbreviate = FALSE, width = 23)
print(xi, abbreviate = 2)

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