Visualising Similarity or Dissimilarities Using a Heatmap Table (ggplot2 example)

In the previous note, I have shown an example for usage of “corrplot” package to visualize the correlations between different objects. Another way is using a heatmap table. Especially if the measure of similarity/dissimilarity is not correlation and the distribution of the values is skewed, using heatmap table offers much more flexibility. What is the difference between a heatmap and a heatmap table? Well, cannot say there is much difference. Heatmap is basically a table where the values are represented by the colors and a good way to summarize a large volume of data. Heatmap table can be thought of as a small version of a heatmap where you can also add the values. Basically it is a coloured table :) Enough of words, let’s see what it is and when it is useful: check the example here.


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