item_attrib-operators {TestDesign}

Basic functions for item attribute objects

Description

Basic functions for item attribute objects

Usage

## S4 method for signature 'item_attrib,numeric'
x[i, j, ..., drop = TRUE]

## S4 method for signature 'item_attrib'
dim(x)

## S4 method for signature 'item_attrib'
colnames(x)

## S4 method for signature 'item_attrib'
rownames(x)

## S4 method for signature 'item_attrib'
names(x)

## S4 method for signature 'item_attrib'
as.data.frame(x, row.names = NULL, optional = FALSE, ...)

Arguments

x

an item_attrib object.

i, j

indices to use in subsetting.

...

not used, exists for compatibility.

drop

not used, exists for compatibility.

row.names

not used, exists for compatibility.

optional

not used, exists for compatibility.

Examples

x <- itemattrib_science
x[1:10]
dim(x)
ncol(x)
nrow(x)
colnames(x)
rownames(x)
names(x)
as.data.frame(x)