pesticides (version 0.1)

peach: Pesticide residue measurements for peaches

Description

Pesticide residues for peaches from the USDA Pesticide Data Program.

Usage

data(peach)

Format

A data frame with 4272 observations on the following 13 variables.

pesticide

The pesticide measured.

comp

Measured composite residue.

ss

Measured single item residue.

lod

Minimum level of detection.

items

Number of items per composite.

state

State collected.

origin

Origin of the produce.

year

Year.

month

Month.

day

Day.

site

Site.

lab

Lab that completed measurements.

variety

Peach variety.

Source

United States Deparatment of Agriculture Pesticide Data Program.

Details

When the number of items for a composite was listed as zero, it was replaced with the average items per composite from the rest of the data set.

Examples

data(peach)
these <- peach$pesticide == peach$pesticide[1]
r     <- cor(peach$comp[these], peach$ss[these])
n     <- mean(peach$items[these])
cor2icc(r, n, "not")