Description

The function nmfApply provides exteneded apply-like functionality for objects of class NMF. It enables to easily apply a function over different margins of NMF models.

Usage

Arguments

Details

The function FUN is applied via a call to apply or sapply according to the value of argument MARGIN as follows:

MARGIN=1

apply FUN to each row of the basis matrix: apply(basis(X), 1L, FUN, ...).

MARGIN=2

apply FUN to each column of the coefficient matrix: apply(coef(X), 2L, FUN, ...).

MARGIN=3

apply FUN to each pair of associated basis component and basis profile: more or less sapply(seq(nbasis(X)), function(i, ...) FUN(basis(X)[,i], coef(X)[i, ], ...), ...).

In this case FUN must be have at least two arguments, to which are passed each basis components and basis profiles respectively – as numeric vectors.

MARGIN=4

apply FUN to each column of the basis matrix, i.e. to each basis component: apply(basis(X), 2L, FUN, ...).

MARGIN=5

apply FUN to each row of the coefficient matrix: apply(coef(X), 1L, FUN, ...).

Value

a vector or a list. See apply and sapply for more details on the output format.