recTensor {nnTensor}

Tensor Reconstruction from core tensor (S) and factor matrices (A)

Description

Combined with plotTensor3D function and the result of NTF or NTD, the reconstructed tesor structure can be visullized.

Usage

recTensor(S = NULL, A = NULL, idx = seq_along(dim(S)), reverse = FALSE)

Arguments

S

K-order tensor object, which is defined as S4 class of rTensor package.

A

A list containing K factor matrices.

idx

The direction of mode-n muliplication (Default: 1:K). For example idx=1 is defined. S x_1 A is calculated (x_1 : mode-1 multiplication).

reverse

If reverse = TRUE, t(A[[n]]) is multiplicated to S (Default: FALSE).

Value

Tensor object, which is defined as S4 class of rTensor package.

Author(s)

Koki Tsuyuzaki

See Also

Tensor-class, NTF, NTD

Examples

tensordata <- toyModel(model = "CP")
out <- NTF(tensordata, rank=3, algorithm="Beta-HALS", num.iter=2)
rec <- recTensor(out$S, out$A)