I am trying to analyze the relationship/correlation between two categorical datasets. I was going through the Grey theory, particularly because it is suitable for small and incomplete data.
I understand the application of this theory in multi-criteria decision making or analyzing numerical data. I am wondering if I can use this to analyze the relationship between a reference dataset (categorical) and two other datasets (categorical) to see which dataset has a better correlation with the reference data.
There are many research articles which applied grey analysis for categorical data please check link https://link.springer.com/content/pdf/10.1007/s001700300043.pdf
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Grey relational analysis (GRA) is a part of the grey system theory proposed by ... with two excellent tools, namely, analytic hierarchy process (AHP) and data ... a trapezoidal fuzzy number can be transformed into an interval number as follows:
Gray relation analysis used for machining process analysis. Kindly go through the video https://www.youtube.com/watch?v=9leOLn_2Dds&t=217s
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