calculate_ess: Compute the current effective sample size

In OxfordRSE/trachomAMIS: What the Package Does (One Line, Title Case)

Compute the current effective sample size

Description

This function returns the effective sample size (ESS) for each location. For each column of the weight matrix weight_mat, the ESS component is computed as

(∑_{i=1}^{N} w_{i}^2 )^{-1}

where N is the number of sampled parameter values for each location.

Usage

calculate_ess(weight_mat, log)

Arguments

weight_mat	The weight matrix. A N x L matrix with L the number of locations and N the number of sampled parameter values.
log	logical indicating if the weights are on the log scale.

Value

A vector containing the ESS value for each location.

See Also

compute_weight_matrix

OxfordRSE/trachomAMIS documentation built on Aug. 1, 2022, 10:21 p.m.