L.mat: Calculates the difference matrix of order m

Description Usage Arguments Value Note Author(s) References

Description

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

Usage

1
L.mat(penden.env)

Arguments

penden.env

Environment of pendensity()

Value

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

The needed values are saved in the environment.

Note

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

Author(s)

Christian Schellhase <cschellhase@wiwi.uni-bielefeld.de>

References

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



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