Set of tools to fit a semi-parametric regression model suitable for analysis of data sets in which the response variable is continuous, strictly positive, asymmetric and possibly, censored. Under this setup, both the median and the skewness of the response variable distribution are explicitly modeled by using semi-parametric functions, whose non-parametric components may be approximated by natural cubic splines or P-splines. Supported distributions for the model error include log-normal, log-Student-t, log-power-exponential, log-hyperbolic, log-contaminated-normal, log-slash, Birnbaum-Saunders and Birnbaum-Saunders-t distributions.

Fitting Semi-Parametric log-Symmetric Regression Models

package-ubuntu-20.04-r-4.0.5#cran#ssym-1.5.7

<p><b>logLik.ssym</b> extracts the value of the log-likelihood function avaliated at observed data and parameter estimates from an object of class “"ssym".</p>

package-ubuntu-20.04-r-4.0.5#cran#ssym-1.5.7#docs#logLik.ssym

logLik.ssym

Description

ssym

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