Create Silhouette coefficient for KMeans clustering. #3
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PR for calculating Silhouette coefficient for KMeans clustering by
ClusterAnalysis.jl. In this PR, I propose two ways of calculating the metric. A primary way (which has even more computation cost than KMeans) and a Simplified version for big datasets. You can determine when to switch to the Simplified version by changing10^3inif big(size(data, 1))^2 > 10^3based on theSilouhettefunction.Also, I brought a little benchmarking here:
https://discourse.julialang.org/t/silhouette-coefficient-calculation/89861/6?u=shayan