Compute unfolding stress — morie_spatial_voting_unfolding_stress • rmorie

Compute unfolding stress

Usage

morie_spatial_voting_unfolding_stress(X_r, X_s, D, weights = NULL)

Arguments

X_r: Respondent coordinates (n_r x n_dims).
X_s: Stimulus coordinates (n_s x n_dims).
D: Observed respondent-stimulus dissimilarities.
weights: Optional weight matrix.

Value

A numeric scalar, the weighted sum of squared residuals.

References

Coombs (1964); Armstrong et al. (2021).

Examples

Xr <- matrix(rnorm(6), 3, 2); Xs <- matrix(rnorm(8), 4, 2)
D  <- matrix(stats::runif(12), 3, 4)
morie_spatial_voting_unfolding_stress(Xr, Xs, D)
#> [1] 61.76314