Internal PARAFAC alternating least-squares (ALS) core algorithm — parafac_core_als • parafac4microbiome

Internal PARAFAC alternating least-squares (ALS) core algorithm

Usage

parafac_core_als(Tensor, nfac, init, maxit = 500, ctol = 1e-04)

Arguments

Tensor: Tensor data object
nfac: Number of components to compute
init: Initialization from initializePARAFAC.
maxit: Maximum number of iterations to run (default 500).
ctol: Loss function tolerance for convergence (default 1e-4)

Value

List containing a Fac object and the loss per iteration

Examples

A = array(rnorm(108*2), c(108,2))
B = array(rnorm(100*2), c(100,2))
C = array(rnorm(10*2), c(10,2))
Tensor = reinflateTensor(A, B, C)
init = initializePARAFAC(Tensor, 2)
model = parafac_core_als(Tensor, 2, init)