sits (version 1.12.0)

sits_envelope: Envelope filter

Description

This function computes the envelope of a time series using the streaming algorithm proposed by Lemire (2009). This functions calls `dtwclust::compute_envelope` function.

Usage

sits_envelope(data.tb = NULL, operations = "UULL",
  bands_suffix = "env")

Arguments

data.tb

A tibble with time series data and metadata.

operations

A character sequence indicating which operations must be taken. "U" for upper filter, "L" for down filter.

bands_suffix

Suffix to be appended to the resulting data (default "env").

Value

A tibble with filtered time series values.

Examples

# NOT RUN {
# Read a set of samples of forest/non-forest in Amazonia
# This is an area full of clouds
data(prodes_226_064)
# Select the NDVI band of the first point
point_ndvi.tb <- sits_select_bands(prodes_226_064[1,], ndvi)
# Apply the envelope filter
point_env.tb <- sits_envelope(point_ndvi.tb)
# Merge the filtered with the raw data
point2.tb <- sits_merge (point_ndvi.tb, point_env.tb)
# Plot the result
sits_plot (point2.tb)
# }