Orfs: ORFS method
In SpotSampling: SPatial and Optimally Temporal (SPOT) Sampling

Description Usage Arguments Value Author(s) References See Also Examples

View source: R/Orfs.R

Select temporal samples with fixed size at each wave using the cube method. It provides optimal time rotation of the selected samples using the systematic sampling method.

1	Orfs(pik, EPS = 1e-08, comment = TRUE)

`pik`	a matrix of temporal inclusion probabilities. Columns of `pik` correspond to the waves, and rows correspond to the units. Inclusion probabilities can be totally unequal.
`EPS`	a tolerance parameter. Default value is 1e-8.
`comment`	a comment is written during the execution if `comment` is TRUE (default value).

a matrix that contains temporal samples. This is the update of pik and contains only 0s and 1s that indicates if a unit is selected or not at each wave.

Esther Eustache esther.eustache@unine.ch, Raphael Jauslin raphael.jauslin@unine.ch

Quenouille, M. H. (1949). Approximate Tests of Correlation in time-Series. Royal Statistical Society, Series B Vol. 11, No. 1 (1949), pp. 68-84.

SystematicDesign, ReducedSamplecube

## Temporal inclusion probabilities with 3 waves and 4 units ##
pik <- matrix(c(0.6,0.3,0.3,
                0.2,0.4,0.9,
                0.3,0.2,0.5,
                0.9,0.1,0.3), ncol = 3, byrow = TRUE)
## ORFS method ##
Orfs(pik)