tdbscan

tdbscan

Usage

tdbscan(track, eps, minPts = 5, borderPoints = FALSE, maxLag = 6, minTenure)

Arguments

track

A sf object (for now).

eps

size of the epsilon neighborhood (see dbscan::dbscan() ).

minPts

number of minimum points in the eps region (for core points). Default is 5 points (see dbscan::dbscan() ).

borderPoints

Logical; default to FALSE (see dbscan::dbscan() ).

maxLag

maximum relative temporal lag (see notes). Default to 6.

minTenure

minimum time difference, in hours, between the last and the first entry a cluster. Clusters with values smaller than minTenure are discarded.

Note

When maxLag is set to maxLag>N output is the same as for dbscan.

Examples

data(pesa56511)
x = as_tdbscan(pesa56511, time = "locationDate", s_srs = 4326)
#> Error in as_tdbscan(pesa56511, time = "locationDate", s_srs = 4326): unused argument (s_srs = 4326)
x = st_transform(x, '+proj=eqearth')
#> Error in st_transform(x, "+proj=eqearth"): could not find function "st_transform"
z = tdbscan(track=x, eps =6600 , minPts   = 8, maxLag = 6, borderPoints = TRUE )
#> Error: object 'x' not found

# Set minTenure
z = tdbscan(x, eps =6600, minPts   = 8, maxLag = 6, borderPoints = TRUE, minTenure= 24 )
#> Error: object 'x' not found