des_length: Get the number of coordinates within each track

In psyosphere: Analyse GPS Data

Description

Get the number of coordinates within each track

Usage

des_length(
  tracks, cgaps = "", cname = "length", drop = TRUE, t_id = "id", des_df = ""
)

Arguments

tracks	psyo. Data frame with tracks.
cgaps	character. Column name of tracks that marks gaps with TRUE.
cname	character. Column name of the returned calculation result.
drop	logical. If TRUE and only one observation is returned drop the data frame and collapse the return value to a vector.
t_id	character or numeric. Column name in tracks that identifies the separate tracks.
des_df	data frame. Function results will be merge with this data frame.

Value

Data frame

t_id	unique id of the track
cname	calculated result of the track

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

des_summary, des_duplicates, des_first, des_last, des_max, des_min, des_mean, des_sd, des_sum

Examples

## Not run: 
# Get data
data(psyo_rounds2)
tracks <- psyo_rounds2

# Calculations
descriptive <- des_length(tracks)

## End(Not run)

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