Module # 10: Time Series & Analysis
A time series is a series of data points indexed in time order. Most commonly, a time series is a sequence taken at successive equally spaced points in time. Thus it is a sequence of discrete-time data
This week I used ggplot2 and the economics data set which comes within this library to create a time series graph of unemployment in the United States (US) by the year starting in 1970 and going to 2010.
The graph shows a steady increase in unemployment beginning a little before 1970 and peaking at around 1983. The second highest peak is 30 years later at around 2010.
Our graph shows unemployment in the thousands from the economics data set in ggplot2 and is divided by the total US population in thousands as well.
This gives us a percenatge and we can see unemployment peaked a little over 5%.