influence.ssym

<b>influence</b> extracts from a object of class ``ssym" the local influence measures and displays graphics of them against the index of the observations.

This package allows to fit a regression model suitable for data analysis in which the conditional distribution of the response is symmetric continuous and where its location and dispersion parameters are explicitly modelled through semi-parametric functions, whose non-parametric components are approximated by natural cubic splines or P-splines.  Supported distributions for the model error include normal, Student-t, power exponential, symmetric hyperbolic, contaminated normal, slash, sinh-normal and sinh-t distributions.

influence.ssym: Tool to build incidence and penalty matrices in order to approximate smooth functions by natural cubic splines.

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