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Specifies how the cluster centroids should be initialized.
LINEAR: Cluster centroids are evenly spaced between the minimum and maximum values of a given weight tensor.
RANDOM: Centroids are sampled using the uniform distribution between the minimum and maximum weight values in a given layer.
DENSITY_BASED: Density-based sampling obtained as follows: first a cumulative distribution function is built for the weights, then the Y axis is evenly spaced into as many regions as many clusters we want to have. After this the corresponding X values are obtained and used to initialize the clusters centroids.
KMEANS_PLUS_PLUS: cluster centroids using the kmeans++ algorithm