Water: Water data set

In zCompositions: Treatment of Zeros, Left-Censored and Missing Values in Compositional Data Sets

Water data set

Description

100 simulated samples of a 4-part groundwater composition in percentage subject to multiple limits of detection by component. The associated matrix of limits of detection is stored in mdl.

Usage

data(Water)

Format

A data.frame with 100 observations on the following 4 variables.

Potassium

a numeric vector

Arsenic

a numeric vector

Calcium

a numeric vector

Sulphate

a numeric vector

Details

Three limits of detection (0.75, 1 and 1.25) were considered for Potassium, four for Arsenic (1.5, 3, 4 and 5), two for Sulphate (29 and 35) and no one for Calcium. In the case of Sulphate, the detection limit equal to 29 is the minimum value registered for that component. All nondetects coded as 0.

Examples

data(Water)
zPatterns(Water,label=0)

zCompositions documentation built on June 22, 2024, 9:46 a.m.