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Abstract:
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Interval data are widely used in many fields, notably economics, industry. Similarly to the scatter plot for single-value data, the rectangle plot and cross plot are the conventional visualization methods for the relationship between two variables in interval forms. These methods do not provide much information to assess the complicated relationship, however. In this paper, we propose two visualization methods: Segment and Dandelion Plots. They offer much more information than the existing visualization methods and allow us to have a much better understanding of the relationship between two variables in interval forms. A general guideline for reading these plots is provided. Relevant theoretical supports are developed. Both the empirical and real data examples are provided to demonstrate the advantages of the proposed visualization methods.
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