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Correlation matrix plot

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Correlation matrix plot
This plot shows a correlation matrix, using blue for positive correlation and red for negative. The ellipses represent the level of correlation.
Visual types
Level of expertise
Source:
Murdoch, D.J. and Chow, E.D. (1996). A graphical display of large correlation matrices. The American Statistician 50, 178-180.
http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=149
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Benefits & pitfalls to avoid
  • When using colours to portray data values or types, ensure that the colors used are accessible to all users. Online tools such as ColorBrewer (www.colorbrewer.org) can help identify issues with colours used.
Create your own
  • Area charts can be created in a range of standard data applications such as Excel.