These functions are convenient wrappers for spam objects
to classical matrix operations.
var.spam(x, …)# S3 method for spam
var(x, …)
matrix of class spam.
further arguments passed to or from other methods.
Depends on function…
There is probably no point in fully defining methods here. Typically, these functions do not exploit sparsity structures. Hence, for very large matrices, warnings may be posted.
Option "inefficiencywarning" in spam.options.