These functions produce predictions from the low-rank solution of `softImpute`

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`x` |
a matrix with NAs or a matrix of class |

`object` |
an svd object with components u, d and v |

`i` |
vector of row indices for the locations to be predicted |

`j` |
vector of column indices for the locations to be predicted |

`unscale` |
if |

`impute`

returns a vector of predictions, using the reconstructed
low-rank matrix representation represented by `object`

. It is used by complete,
which returns a complete matrix with all the missing values imputed.

Either a vector of predictions or a complete matrix. WARNING: if
`x`

has large dimensions, the matrix returned by `complete`

might be too large.

Trevor Hastie

`softImpute`

, `biScale`

and `Incomplete`

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