| gdltraj {adehabitat} | R Documentation |
Gets the parts of the trajectories stored in an object of class
ltraj of type II (time recorded), corresponding to a specified
time period.
gdltraj(x, min, max, type = c("POSIXct", "sec", "min", "hour", "mday",
"mon", "year", "wday", "yday"))
x |
an object of class ltraj of type II (time recorded) |
min |
numeric. The beginning of the period to consider |
max |
numeric. The end of the period to consider |
type |
character. The time units of min and
max |
The limits of the period to consider may correspond to any of the
components of the list of class POSIXlt (hour, day, month,
etc.; see help(POSIXlt)), or to dates stored in objects of
class POSIXct (see examples).
an object of class ltraj.
Clement Calenge clement.calenge@oncfs.gouv.fr
ltraj for further information about objects of
class ltraj, POSIXlt for further information
about objects of class POSIXlt
data(puechcirc)
plot(puechcirc, perani = FALSE)
## Gets all the relocations collected
## between midnight and 3H AM
toto <- gdltraj(puechcirc, min = 0, max = 3, type="hour")
plot(toto, perani = FALSE)
## Gets all relocations collected between the 15th
## and the 25th august 1993
lim <- as.POSIXct(strptime(c("15/08/1993", "25/08/1993"),
"%d/%m/%Y"))
tutu <- gdltraj(puechcirc, min = lim[1],
max = lim[2], type="POSIXct")
plot(tutu, perani = FALSE)