This repository contains 7 R scripts and 6 png plot files:
downloadData.R
- code that downloads and unzips the emissions dataplot1.R
- plots total US emission by year (output:plot1.png
)plot2.R
- plots Baltimore emissions by year (output:plot2.png
)plot3.R
- plots Baltimore emissions by collection source type (output:plot3.png
)plot4.R
- plots US coal combustion related emissions by year (output:plot4.png
)plot5.R
- plots Baltimore motor vehicle related emissions by year (output:plot5.png
)plot6.R
- plots Baltimore and LA motor vehicle related emissions by year (output:plot6.png
)
The R downloadData.R
script downloads and unzips the data. While the plot*.R
scripts perform various exploratory data analysis and plotting of the emissions data.
Run source("downloadData.R")
to download and unpack the emissions data.
Unpacked data files:
summarySCC_PM25.rds
- the emissions data by fips location code, SCC emission code, Pollutant, Emissions value, collection type, and yearSource_Classification_Code.rds
- the table explaining each SCC emission code
Run plot*.R
to plot the data and write the output plots to a corresponding png file plot*.png
in your working directory.
plot*.R
depends on dplyr
and gpplot2
. If not installed, it will download and install the these packages.