A class for storing a sampling pattern.
Objects can be created by calls of the form new("SamplingPattern", ...). However, objects are usually created by calling spsample.
signature(from = "SamplingPattern", to = "data.frame"): coerces to "data.frame".
signature(from = "SamplingPattern", to = "SpatialPoints"): coerces to "'>SpatialPoints".
signature(object = "SamplingPattern"): returns the sample size.
signature(x = "CompactStratification", y = "SamplingPattern"): plots sampling pattern y on top of stratification x.
signature(x = "SamplingPattern", y = "missing"): plots sampling pattern x.
signature(object = "SamplingPattern"): prints object on the output device.