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EPA.09.Ex.17.7.sodium.df: Sodium Concentrations from Example 17-7 of 2009 USEPA Guidance Document

Description

Sodium concentrations (ppm) collected over several years. The sample dates are recorded as the year of collection (2-digit format) plus a fractional part indicating when during the year the sample was collected.

Usage

EPA.09.Ex.17.7.sodium.df

Arguments

Format

A data frame with 10 observations on the following 2 variables.

Year

a numeric vector indicating the year of collection (a fractional number)

Sodium.ppm

a numeric vector of sodium concentrations (ppm)