average_coordinates: Calculates the mean position of coordinates within a time...

In psyosphere: Analyse GPS Data

Description

Calculates the mean position of coordinates within a time interval.

Usage

average_coordinates(tracks, num, units = "minutes", t_id = "id")

Arguments

tracks	psyo. Data frame with tracks.
num	num The amount of time.
units	char Unit for time measurement. For example: "seconds", "minutes" or "days". See duration for more details.
t_id	character or numeric. Column name in tracks that identifies the separate tracks.

Details

This function can be used to compress huge amounts of data to speed up the calculations.

The average for the columns time, lon and lat is calculated. See geomean for details. Other columns will be preserved but only the first row of every interval is considered.

Value

data frame

lon	num averaged longitude
lat	num averaged latitude
time	POSIXct averaged time
other	Preserved columns from input

Credit

If you use 'psyosphere' for commercial use or research, please support us by include one off the following references:

• MIT license: "psyosphere" by B. Ziepert, E. G. Ufkes & P. W. de Vries from https://CRAN.R-project.org/package=psyosphere

• APA: Ziepert, B., Ufkes, E., & de Vries, P. W. (2018). psyosphere: Analyse GPS Data. Retrieved from https://CRAN.R-project.org/package=psyosphere

• APA: Vries, P., Ziepert, B., & Ufkes, E. (2016). "De psychologie van bewegingen GPS-technologie voor de analyse van natuurlijk gedrag." Tijdschrift voor Human Factors 2: 11-15.

Author(s)

Benjamin Ziepert. Please send feedback to: [e-mail].

See Also

geomean, average_duplicates, select_test_sample

Examples

## Not run: 
data(psyo_geomean)
average_coordinates(psyo_geomean,30,"seconds")

## End(Not run)

psyosphere documentation built on July 2, 2020, 12:08 a.m.