calculateWadeableReachLength: Calculates the reach length for a wadeable site

In jasonelaw/nrsa: Calculate metrics for NRSA protocol data.

Description

Calculates the reach length for a wadeable site using the number of stations per site and the increment between stations. The number of stations per site must be calculated using nWadeableStations prior to passing to this function. Thus, the data passed to this function is site-level data.

Usage

calculateWadeableReachLength(uid, n.station, increment)

Arguments

uid	a vector of site identifiers
n.station	the number of station per site
increment	the distance between stations at a wadeable site

Value

a 'metric' data.frame

Examples

increment <- expand.grid(uid = 1:10, increment = 1.5)
d <- expand.grid(uid = 1:10, transects = LETTERS[1:11], station = 0:9)
n.sta <- nWadeableStations(d$uid, d$transects, d$station, by = 'site')
d <- merge(increment, n.sta, by = 'uid')
calculateWadeableReachLength(d$uid, d$n.sta, d$increment)

jasonelaw/nrsa documentation built on Nov. 8, 2019, 11:34 a.m.