ORFID (version 1.0.3)

tag_direction: Movement direction for Oregon RFID antenna data

Description

Determines direction of tag movement in systems where multiple antennas are used along a linear migration route.

Usage

tag_direction(x, LOC_vec)

Value

Returns a tibble object. The column DIR displays direction, where U is upstream movement, D is downstream movement, and S is no movement, or a consecutive detection at the previous location.

Arguments

x

data frame generated using join_multireader_data.

LOC_vec

vector of antenna locations from first encountered to last encountered.

Author

Annika Putt <[e-mail]>

Details

tag_direction determines the direction of movement for individual detection events in x. Direction is determined based on the order of locations from first encountered to last encountered, as specified in LOC_vec. Note that direction cannot be determined until the tag has been detected at multiple locations. Use site_summary to identify all locations present in the multi-reader data, which must be included in LOC_vec.

See Also

import_ORFID for importing data files from Oregon RFID ORMR and ORSR antenna readers.

join_multireader_data for combining data from Oregon RFID ORMR and ORSR antenna readers into a multi-reader array.

site_summary for identifying all locations present in a multi reader array

Examples

# Create a list containing compiled reader data:
readers <- list(reader_us, reader_ds)

# Join data into a multi-reader array:
PIT_data <- join_multireader_data(readers)

# List readers:
unique(PIT_data$LOC)

# Determine tag direction for animals moving from downstream to upstream:
tag_direction(PIT_data, c("downstream_A1", "upstream_A1"))