fitMultiMigration: Fit multiple migrations

In ABoVE-AotM/above: Functions and methods for the Animals on the Move project of the Arctic Boreal Vulnerability Experiment (ABoVE - NASA).

Description

This function allows for the analysis of multiple migration in a single movement time series.

Usage

fitMultiMigration(data, span1, span2, plot)

Arguments

data	A processed daily averaged data frame, i.e. output of processMovedata
span1	A vector of *initial* times for analysis windows. Should be of length *k*, where *k* is the number of migrations to fit.
span2	A vector of *final* times for analysis windows
plot	Whether or not to visualize the output with plotMultimigrationFit

Value

a data frame with the date, duration, estimated ranging areas of each of the migrations.

Examples

## Not run: 
### Enter Login and Password information for Movebank
# login <- movebankLogin(username="xxxx", password="xxxx")

# Download data
ds <- getMovebankData(study="ABoVE: NPS Dall Sheep Lake Clark", login=login) 

# Process data for use in above package
ds.mt <- processMovedata(ds,  idcolumn = "individual_id", projTo = '+init=epsg:3338', 
                        keepCols = c('sex'), dailymean = TRUE)

# Summarize and find individual
summary(ds.mt)
plot(ds.mt)

#240653478 or 240653490
di <- subset(ds.mt, id == 240653490)

# Plot movement tracks to identify migrations and use
# with locator below
par(mfrow=c(2,1), mar = c(0,0,0,0), oma = c(5,5,2,2))
with(di, plot(day, x, type='o'))
with(di, plot(day, y, type='o'))

# Use locator to bracket each individual (i.e., directional) migration
span1 <- locator(4)$x
span2 <- locator(4)$x

di.migrations <- fitMultiMigration(di, span1, span2, plot = TRUE)
di.migrations

ABoVE-AotM/above documentation built on May 28, 2020, 6:08 a.m.