Acidity {mixAK} | R Documentation

## Acidity index of lakes in North-Central Wisconsin

### Description

Acidity index measured in a sample of 155 lakes in North-Central Wisconsin.

Crawford et al. (1992) and Crawford (1994) analyzed these data as a mixture of normal distributions on the log-scale. Richardson and Green (1997) used a normal mixture estimated using reversible jump MCMC.

### Usage

    data(Acidity)

### Format

A numeric vector with observed values.

### Source

http://www.stats.bris.ac.uk/~peter/mixdata

### References

Crawford, S. L. (1994). An application of the Laplace method to finite mixture distribution. Journal of the American Statistical Association, 89, 259–267.

Crawford, S. L., DeGroot, M. H., Kadane, J. B., and Small, M. J. (1994). Modeling lake chemistry distributions: Approximate Bayesian methods for estimating a finite mixture model. Technometrics, 34, 441–453.

Richardson, S. and Green, P. J. (1997). On Bayesian analysis of mixtures with unknown number of components (with Discussion). Journal of the Royal Statistical Society, Series B, 59, 731–792.

### Examples

    data(Acidity)
    summary(Acidity)

[Package mixAK version 0.6 Index]