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ggcleveland (version 0.1.0)

ozone: Dataset ozone

Description

From Cleveland (1993): The data are daily maximum ozone concentrations at ground level on 132 days from May 1,1974 to September 30,1974 at two sites in the U.S.A. <U+2014> Yonkers, New York and Stamford, Connecticut <U+2014> which are approximately 30 km from one another. The sample for each measurement is the air mass on a particular day, and the bivariate data arise from two measurements at the two sites.

Usage

ozone

Arguments

Format

A data frame with 132 rows and 2 variables:

dia

day

yonkers

air mass at Yonkers

stamford

air mass at Stamford