Alternating Least Squares with Groups for Constrained Dual Scaling

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Description

Alternating least-sqaures for estimating row and column scores in constrained dual scaling, where different groups are allowed for.

Usage

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group.ALS(a, m, q, G, Fr.cent, eps = 0.1, maxit = 50, Mmat,
  info.level = 2, const, K, n, tol)

Arguments

a

A 2n-vector of row scores.

m

Integer; the number of items.

q

Integer; the rating scale from 1:q.

G

An indicator matrix of size n by K.

Fr.cent

The centred F_r matrix.

eps

The numerical tolerance level for the loss.

maxit

Integer; the maximum number of iterations allowed.

Mmat

Matrix of spline basis functions.

info.level

Integer controlling the amount of information printed.

const

The constant part of the loss function.

K

The number of latent classes.

n

The number of samples.

tol

tolerance tol passed to lsei of the limSolve package

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