PAMpal (version 1.4.4)

filter.AcousticStudy: Filter an AcousticStudy or AcousticEvent Object

Description

Apply dplyr-like filtering to the detecitons of an AcousticStudy or AcousticEvent object, with a special case for filtering by species for an AcousticStudy

Usage

# S3 method for AcousticStudy
filter(.data, ..., .preserve = FALSE)

Value

The original .data object, filtered by the given logical expressions

Arguments

.data

AcousticStudy or AcousticEvent to filter

...

Logical expressions, syntax is identical to filter. There are special cases to filter by environmental variables, species ID, database, or detector name. See details.

.preserve

not used

Author

Taiki Sakai

Details

Most expression provided will be used to filter out detections based on calculated parameters.

If the name of an environmental variable added using matchEnvData,AcousticStudy-method is provided, will filter to only events with environmental variables matching those conditions.

If a provided logical expression uses "species" or "Species", then events will be filtered using the species present in the $id of the species slot of each event.

If a provided logical expression uses "database" or "Database", then only events with databases matching the expression in files(.data)$db will remain

If a provided logical expression uses "detector" or "Detector", then only detections from detectors with names matching the expression will remain in events. Any events left with no detections will be removed.

Examples

# create example data
data(exStudy)
exStudy <- setSpecies(exStudy, method='manual', value=letters[1:2])
filterData <- filter(exStudy, peak < 20)
getDetectorData(filterData)$click

filterData <- filter(exStudy, species == 'a')
species(filterData[[1]])