patterns: Response Patterns for Given Total Score(s)

In ltbayes: Simulation-Based Bayesian Inference for Latent Traits of Item Response Models

Description

patterns determines the response patterns that yield one or one of several total scores.

Usage

patterns(m, r, total)

Arguments

m	Number of items.
r	Number of response categories.
total	Vector of total score or scores. Note that item responses are assumed to be integer-valued from 0 to r-1, so total scores should be between 0 and m(r-1).

Details

This is essentially a utility function to be used to prepare input for postsamp, postmode, posttrace, profileci, or information.

Value

y	Matrix of size s by m of the s response patterns that would yield (one of) the total score(s) in total.

Author(s)

Timothy R. Johnson

See Also

postsamp, postmode, posttrace, profileci, information

Examples

# response patterns for five binary items that
# yield a total score of 3

y <- patterns(5, 2, 3)

# response patterns for 3 5-category items that
# yield a total score of at least 3

y <- patterns(3, 5, c(3:12))

ltbayes documentation built on May 2, 2019, 12:40 p.m.