Get the minPts and eps values for DBSCAN to label only a specific percentage as noise

Usage

get_dbscan_params(
  sessions,
  MinPts,
  eps0,
  noise_th = 2,
  eps_offset_pct = 0.9,
  eps_inc_pct = 0.02,
  log = getOption("evprof.log", FALSE),
  start = getOption("evprof.start.hour")
)

Arguments

sessions: tibble, sessions data set in evprof standard format
MinPts: DBSCAN MinPts parameter
eps0: DBSCAN eps parameter corresponding to the elbow of kNN dist plot
noise_th: noise threshold
eps_offset_pct: eps_offset_pct
eps_inc_pct: eps_inc_pct
log: logical, whether to transform ConnectionStartDateTime and ConnectionHours variables to natural logarithmic scale (base = exp(1)).
start: integer, start hour in the x axis of the plot.

Value

tibble with minPts and eps parameters, and the corresponding noise