Description Usage Arguments Value Note Author(s) References

Calculating the differences matrix 'L' of order 'm', depending on the number of knots 'k'.

1 | ```
L.mat(penden.env)
``` |

`penden.env` |
Environment of pendensity() |

Returns the difference matrix of order 'm' for given number of knots 'K'.

The needed values are saved in the environment.

Right now, the difference matrix is implemented for m=1,2,3,4.

Christian Schellhase <[email protected]>

Density Estimation with a Penalized Mixture Approach, Schellhase C. and Kauermann G. (2012), Computational Statistics 27 (4), p. 757-777.

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