rs_fold-methods | R Documentation |

The inverse operation to `rs_unfold`

.

rs_fold(mat, m = NULL, modes = NULL) ## S4 method for signature 'DelayedArray' rs_fold(mat, m, modes)

`mat` |
DelayedArray object (only 2D) |

`m` |
the mode corresponding to rs_unfold |

`modes` |
the original modes of the DelayedArray |

This function is an extension of the `rs_fold`

by DelayedArray.

This is a wrapper function to `fold`

.

DelayedArray (higher than 2D)

T. Kolda, B. Bader, "Tensor decomposition and applications". SIAM Applied Mathematics and Applications 2009.

`fold`

, `rs_unfold`

library("DelayedRandomArray") darr <- RandomUnifArray(c(2,3,4)) matT2 <- rs_unfold(darr, m=2) identical( as.array(rs_fold(matT2, m=2, modes=c(2,3,4))), as.array(darr))

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