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Synchronicity in trajectory observations

Source: R/is.synchronous.R
is.synchronous.Rd

Checks whether trajectories are synchronous, meaning that observation times are equal. For objects of class cycles the check is performed on dates. For objects of class fd.trajectories, the check is performed correcting for inherent differences in dates.

Usage

is.synchronous(x)

Arguments

x

An object of class trajectories (or its children subclasses fd.trajectories or cycles)

Value

A boolean indicating whether trajectories are synchronous

See also

defineTrajectories

Examples

#Description of sites and surveys
sites <- c("1","1","1","2","2","2")
surveys <- c(1,2,3,1,2,3)
  
#Raw data table
xy<-matrix(0, nrow=6, ncol=2)
xy[2,2]<-1
xy[3,2]<-2
xy[4:6,1] <- 0.5
xy[4:6,2] <- xy[1:3,2]
xy[6,1]<-1

#Synchronous trajectories
x1 <- defineTrajectories(dist(xy), sites, surveys)
is.synchronous(x1)
#> [1] TRUE

# Non synchronous trajectories
x2 <- defineTrajectories(dist(xy[1:5,]), sites[1:5], surveys[1:5])
is.synchronous(x2)
#> [1] FALSE