R: Rescale item parameters

rpf.rescale {rpf} | R Documentation

## Rescale item parameters

### Description

Adjust item parameters for changes in mean and covariance of the latent distribution.

### Usage

    rpf.rescale(m, param, mean, cov)

### Arguments

`m` | item model
`param` | item parameters
`mean` | vector of means
`cov` | covariance matrix

### Examples

    spec <- rpf.grm()
    p1 <- rpf.rparam(spec)
    testPoint <- rnorm(1)
    move <- rnorm(1)
    cov <- as.matrix(rlnorm(1))
    Icov <- solve(cov)
    padj <- rpf.rescale(spec, p1, move, cov)
    pr1 <- rpf.prob(spec, padj, (testPoint-move) %*% Icov)
    pr2 <- rpf.prob(spec, p1, testPoint)
    abs(pr1 - pr2) < 1e9

[Package rpf version 0.59 Index]