compress_clusters_fast: Fast version of compress clusters

In gsClusterDetect: Utilities for Geo-Spatial Cluster Detection and Significance Classification

Fast version of compress clusters

Description

Function reduces an object of class ClusterAlertTable to the final set of clusters and locations. The idea of this function is to retain only the most significant, non-overlapping clusters from the cluster alert table. The surrogate for significance is 'alertGap', or log(observed/expected) minus the threshold that the spline assigns to the observed value'.

Usage

compress_clusters_fast(cluster_alert_table, distance_matrix)

Arguments

cluster_alert_table	an object of class 'ClusterAlertTable'
distance_matrix	a square distance matrix, named on both dimensions or a list of distance vectors, one for each location

Value

an object of class 'clusters', which is simply a a list including a a data.frame of clusters and another frame of individual location counts

Examples

case_grid <- generate_case_grids(
  example_count_data, example_count_data[, max(date)]
)
nci <- gen_nearby_case_info(
  cg = case_grid,
  distance_matrix = county_distance_matrix("OH")[["distance_matrix"]],
  distance_limit = 25
)
obs_exp_grid <- generate_observed_expected(
  nearby_counts = nci,
  case_grid = case_grid
)
cla <- add_spline_threshold(oe_grid = obs_exp_grid)
compress_clusters_fast(
  cluster_alert_table = cla,
  distance_matrix = county_distance_matrix("OH")[["distance_matrix"]]
)

gsClusterDetect documentation built on July 27, 2026, 5:09 p.m.