Teaching:TUW - UE InfoVis WS 2008/09 - Gruppe 02 - Aufgabe 1 - Scatterplot

Scatterplot

A scatterplot (also called a scatter chart, scatter diagram and scatter graph[Wikipedia]) is a diagram in which the values of two variables are applied to the horizontal and vertical axes of a cartesian coordinate system. The resulting point in the graph represents one record from a data set. The distribution pattern of points from multiple records reveal the correlation between the selected variables in the data set. The scatterplot is not to be confused with the correlation plot (http://www.itl.nist.gov/div898/handbook/eda/section3/linecorr.htm) or correlation diagram which treat already determined correlation coefficients.

Revealed Information

outlyers

correlation patterns

regression line

• Wikipedia: http://en.wikipedia.org/wiki/Scatterplot
• University of Illinois: http://www.mste.uiuc.edu/courses/ci330ms/youtsey/scatterinfo.html
• Information Technology Lab, NIST: http://www.itl.nist.gov/div898/handbook/eda/section3/eda33q.htm
• NetMBA: http://www.netmba.com/statistics/plot/scatter/
• ChartItNow: http://www.chartitnow.com/scatter%20diagram.html