distance_traveled: Calculate the 'Distance Travelled' by the Multivariable...

In TrashBirdEcology/distanceTraveled: Calculate Distance Traveled By a System

Description

Calculate the 'Distance Travelled' by the Multivariable System

Usage

distance_traveled(dataIn, group.vars = c("variable"), derivs = T,
  print = T)

Arguments

dataIn	A data frame containing columns 'value', 'time', and any number of state variables (the order of all columns is irrelevant).
group.vars	Character vector of state variable(s) (e.g., species) to be used as grouping variables. Distances will be calculated indiviudally over time, according to these grouping variables. Default = 'variable'
derivs	Logical (Default = T), calculate derivatives of distance traveled?
value	The values over which distance will be calculated (e.g., species abundances).

Examples

time <- c(1:20)
value <- rnorm(n=20)
variable <- rep(c('a','b'), 20)
dist <- distance_traveled(data.frame(time, variable, value))
plot( dist$time, dist$s) # Cumulative distance traveled
plot( dist$time, dist$dsdt)  # Velocity = First derivative of s (Ds/t or dsdt or s')
plot( dist$time, dist$d2sdt2)  # Acceleration = Second derivative of s (Ds/t or dsdt or s')

TrashBirdEcology/distanceTraveled documentation built on June 5, 2019, 2:08 p.m.