XLSTAT - Parallel Coordinates Visualization

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Structure of a Parallel Coordinates plot

If you consider N observations described by P quantitative and Q qualitative variables, the chart consists of P+Q vertical axes each representing a variable, and N lines corresponding to each observation. A line crosses an axis at the value corresponding to the value that the observation takes for the variable corresponding to the axis.

Use of Parallel Coordinates Visualization

This visualization method is useful for data analysis when you need to discover or validate groups. For example, this method could be used after Agglomerative Hierarchical Clustering.

Using this method you are able to visually determine which variables are discriminative.