Modified ST-DBSCAN for African swine fever in South Korea

This is the modified version of ST-DBSCAN for African swine fever in wild boars to detect the local transmission clusters.

The research paper for R0 of ASF in South Korea can be found at following url:

https://www.vetsci.org/DOIx.php?id=10.4142/jvs.2021.22.e71

INPUTS :

x = longitude
y = latitude
death_time = estimated death date
report_time = reported date
day_buf_death = temporal buffer adding to the death date
day_buf_report = temporal buffer adding to the report date
eps = geographical distance threshold
max_viab = maximum duration of transmission viability of ASFV
minpts = number of points to consider a cluster

OUTPUTS :

data$cluster = cluster number data$cldensity = cluster points density