These classes store information gathered by time-depth recorders.
Objects can be created by calls of the
form new("TDR", …) and new("TDRspeed", …).
‘TDR’ objects contain concurrent time and depth readings, as well as a string indicating the file the data originates from, and a number indicating the sampling interval for these data. ‘TDRspeed’ extends ‘TDR’ objects containing additional concurrent speed readings.
In class TDR:
file:Object of class ‘character’, string indicating the file where the data comes from.
dtime:Object of class ‘numeric’, sampling interval in seconds.
time:Object of class POSIXct, time
stamp for every reading.
depth:Object of class ‘numeric’, depth (m) readings.
concurrentData:Object of class
data.frame, optional data collected concurrently.
Class ‘TDRspeed’ must also satisfy the condition that a component of the concurrentData slot is named speed or velocity, containing the measured speed, a vector of class ‘numeric’ containing speed measurements in (m/s) readings.
Since the data to store in objects of these clases usually come
from a file, the easiest way to construct such objects is with the
function readTDR to retrieve all the necessary
information. The methods listed above can thus be used to access all
slots.