Lakes: Lakes Data

In nlr: Nonlinear Regression Modelling using Robust Methods

Description

Lakes data represent a multivariate predictor nonlinear model.

Usage

data(Lakes)

Format

The format is:data.frame chr "Lakes"

• tn: mean annual total nitrogen concentration, response variable.

• nin: average influence nitrogen concentration, predictor variable one.

• tw: water retention time, predictor variable two.

Details

Lakes data is collected from 29 lakes in Florida by United States Environmental Protection Agency (1978). Stromberg (1993) has identified observations 10 and 23 as outliers. The data presents the relationship between the mean annual total nitrogen concentration, TN, as the response variable and the average influence nitrogen concentration, NIN, and water retention time, TW, as predictors.

Source

United Stated Environmental Protection Agency (1978), "A Conpendium of Lake and Reservoir data Collected by the National Eutrophication Survey in Eastern, North Centeral and Southeastern United States," Working Paper #475, Corvallis Environmental Research Labratory, Corvallis, Oregon.

References

Stromberg, A. J. (1993). Computation of High Breakdown Nonlinear Regression Parameters, Journal of American Statistical Association 88(421): 237-244.

Examples

data(Lakes)
Lakes

nlr documentation built on July 31, 2019, 5:09 p.m.