“Diamond Graph” Corrects Long-Standing Errors of 3-D Bar Graphs
Example of New Diamond Graph
Looks can be deceiving. That’s one of the problems with today’s three-dimensional bar graph. While these graphs may look correct, researchers from the Johns Hopkins Bloomberg School of Public Health believe they are in fact inaccurate and misleading.
Currently, the 3-D bar graph is used in countless computer programs, scientific journals, and newspapers to display financial, medical, and other information in which two variables lead to an outcome. Alvaro Muñoz, PhD, a professor of epidemiology at the School of Public Health, has developed the new Diamond Graph, which corrects these errors and represents all the variables equally in a form that is easy to read. He believes the new graphing method could replace the traditional 3-D bar graph in software commonly used in business and science. Dr. Muñoz and his colleagues described the Diamond Graph method in an article published in the August 2003 edition of the peer-reviewed journal, The American Statistician.
Tim Parsons | Johns Hopkins University
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