Description Usage Arguments Value NOTE References Examples

Performs multiplication by factors for certain decompositions (and allows explicit formation of those factors).

1 |

`x` |
a matrix decomposition. No missing values or IEEE special values are allowed. |

`factor` |
an indicator for selecting a particular factor for multiplication. |

`y` |
a matrix or vector to be multiplied by the factor or its transpose. No missing values or IEEE special values are allowed. |

`transpose` |
a logical value. When |

`left` |
a logical value. When |

`...` |
the method for |

the product of the selected factor (or its transpose) and `y`

Factors for decompositions such as `lu`

and `qr`

can be
stored in a compact form.
The function `facmul`

allows multiplication without explicit
formation of the factors, saving both storage and operations.

Golub, G., and Van Loan, C. F. (1989).
*Matrix Computations,*
2nd edition, Johns Hopkins, Baltimore.

1 2 3 4 5 6 7 8 |

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