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Interactive line chart

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Interactive line chart
This is an interactive line graph that displays information about the unemployment rate in the US during the last 2 years in terms of ethnicity, gender, age and education level. Whereas this type of information can be displayed simultaneously using a contingency table, the line graph allows the introduction of time a visualisation dimension that allows to easy grasp of the changes and relative comparison with the desired population breakdowns.
Visual types
Level of expertise
Source:
The New York Times: The New York Times, 4th November 2009. (News)
http://www.nytimes.com/interactive/2009/11/06/business/economy/unemployment-lines.html
Interactive features
The user can select from the top menu the specific population breakdown that she wishes to visualise. Hovering on the graph area also allows the selection of specific lines.
Benefits & pitfalls to avoid
  • Line-charts imply that data is continuously changing. If your data is discrete you might consider a bar-chart instead.