R: Disaggregation in the time dimension through the use of...
rfilltimegaps
R Documentation
Disaggregation in the time dimension through the use of splines for each pixel
Description
The function creates an object of STFDF class, spatio-temporal data with full space-time grid, from another STFDF and fills attribute data for missing dates using splines.
Usage
rfilltimegaps(stfdf,tunits="day",attrname=1, ...)
Arguments
stfdf
STFDF object with time information of minimum length 2, and gap between
tunits
increment of the sequence used to generete time infromation for temporal gap. See 'Details'
attrname
varible from STFDF to be splined
...
arguments passed to spline
Details
tunits can be specified in several ways:
A number, taken to be in seconds
A object of class difftime
A character string, containing one of "sec", "min", "hour", "day", "DSTday", "week", "month", "quarter" or "year". This can optionally be preceded by a (positive or negative) integer and a space, or followed by "s"
The difference between "day" and "DSTday" is that the former ignores changes to/from daylight savings time and the latter takes the same clock time each day. ("week" ignores DST (it is a period of 144 hours), but "7 DSTdays") can be used as an alternative. "month" and "year" allow for DST.)
Kilibarda, M., T. Hengl, G. B. M. Heuvelink, B. Graeler, E. Pebesma, M. Percec Tadic, and B. Bajat (2014), Spatio-temporal interpolation of daily temperatures for global land areas at 1 km resolution, J. Geophys. Res. Atmos., 119, 2294-2313, doi:10.1002/2013JD020803;
Kilibarda M., M. Percec Tadic, T. Hengl, J. Lukovic, B. Bajat - Spatial Statistics (2015), Global geographic and feature space coverage of temperature data in the context of spatio-temporal interpolation, doi:10.1016/j.spasta.2015.04.005.