Description Usage Arguments Details Value Author(s) References

This function is an implementation of the *ρ*-operator found in
Currie et al 2006. It forms the basis of the GLAM arithmetic.

1 | ```
RH(M, A)
``` |

`M` |
a |

`A` |
a 3d array of size |

For details see Currie et al 2006. Note that this particular implementation is not used in the optimization routines underlying the glamlasso procedure.

A 3d array of size *p_2 \times p_3 \times n*.

Adam Lund

Currie, I. D., M. Durban, and P. H. C. Eilers (2006). Generalized linear
array models with applications to multidimensional
smoothing. *Journal of the Royal Statistical Society. Series B*. 68, 259-280.

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