TestDesign (version 1.7.0)

item_attrib-operators: Basic functions for item attribute objects

Description

Basic functions for item attribute objects

Usage

# S4 method for item_attrib,numeric
[(x, i, j, ..., drop = TRUE)
# S4 method for item_attrib
dim(x)
# S4 method for item_attrib
colnames(x)
# S4 method for item_attrib
rownames(x)
# S4 method for item_attrib
names(x)
# S4 method for 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)