object, or the objective value with respect to a given
target matrix y if it is supplied.Returns the objective function associated with the
algorithm that computed the fitted NMF model
object, or the objective value with respect to a
given target matrix y if it is supplied.
# S4 method for NMFfit
objective(object, y)
optional target matrix used to compute the objective value.
an object computed using some algorithm, or that describes an algorithm itself.