acidity: The Acidity Data files for GAMLSS

In gamlss.data: Data for Generalised Additive Models for Location Scale and Shape

The Acidity Data files for GAMLSS

Description

The data shows the acidity index for 155 lakes in the Northeastern United States (previously analysed as a mixture of gaussian distributions on the log scale by Crawford et al.(1992, 1994)). These 155 observations are the log acidity indices for the lakes.

Usage

data(acidity)

Format

A data frame with 155 observations on the following variable.

y

a numeric vector showing the acidity index for 155 lakes in the Northeastern United States

References

Crawford S.L., DeGroot M.H., Kadane J.B., and Small M.J. (1992), Modeling lake-chemistry distributions: Approximate Bayesian methods for estimating a finite-mixture model, Technometrics, 34, pp 441-450.

Crawford S.L. (1994) An application of the Laplace method to finite mixture distributions, JASA, 89. pp 269-278.

McLachlan G. and Peel D., Finite Mixture Models, Wiley, New York.

Examples

data(acidity)
with( acidity, hist(y))

gamlss.data documentation built on May 29, 2024, 10:46 a.m.