trip (version 1.8.5)

trip-class: A class for sets of animal trips (track data).

Description

An extension of SpatialPointsDataFrame-class by including "TimeOrderedRecords". The records within the data frame are explicitly ordered by DateTime data within IDs.

Objects from the Class

Objects can be created by calls of the form trip(obj="SpatialPointsDataFrame", TORnames="TimeOrderedRecords"). The object contains all the slots present within a SpatialPointsDataFrame-class, particularly data which contains columns of at least those specified by TOR.columns.

See Also

trip for examples of directly using the class.

trip-accessors describes methods for accessing information on trip objects.

Examples

# NOT RUN {

showClass("trip")

d <- data.frame(x=1:10, y=rnorm(10), tms=Sys.time() + 1:10, id=gl(2, 5))
sp::coordinates(d) <- ~x+y
## this avoids complaints later, but these are not real track data (!)
sp::proj4string(d) <- sp::CRS("+proj=laea +ellps=sphere", doCheckCRSArgs = FALSE)
tr <- trip(d, c("tms", "id"))

summary(tr)
plot(tr)
lines(tr)

dim(tr)
names(tr)
subset(tr, id == "2")
as.data.frame(tr)

tr[1:3, ]
tr[, 1]
tr[[1]]



# }