get_clusters function

Extracts events from a two-dimensional data stream

This function extracts events from a two-dimensional (1 spatial x 1 time) data stream.

get_clusters(
  dat,
  filename = NULL,
  thres = 0.95,
  vis = FALSE,
  epsilon = 5,
  miniPts = 10,
  rolling = TRUE
)

Arguments

• dat: The data matrix
• filename: If set, the figure of extracted events are saved in this name. The filename needs to include the correct folder and file name.
• thres: The cut-off quantile. Default is set to 0.95. Values greater than the quantile will be clustered. The rest is not clustered.
• vis: If TRUE, the window data and the extracted events are plotted for a 2D data stream.
• epsilon: The eps parameter in dbscan function in the package dbscan
• miniPts: The minPts parameter in dbscan function in the package dbscan
• rolling: This parameter is set to TRUE if rolling windows are considered.

Returns

A list with following components - clusters: The cluster assignment according to DBSCAN output.

• data: The data of this cluster assignment.

Examples

out <- gen_stream(2, sd=15)
zz <- as.matrix(out$data)
clst <- get_clusters(zz, vis=TRUE)