K-Means initialization¶

The K-Means initialization algorithm receives $$n$$ feature vectors as input and chooses $$k$$ initial centroids. After initialization, K-Means algorithm uses the initialization result to partition input data into $$k$$ clusters.

 Operation Computational methods Programming Interface Computing Dense compute(…) compute_input compute_result

Mathematical formulation¶

Computing¶

Given the training set $$X = \{ x_1, \ldots, x_n \}$$ of $$p$$-dimensional feature vectors and a positive integer $$k$$, the problem is to find a set $$C = \{ c_1, \ldots, c_k \}$$ of $$p$$-dimensional initial centroids.

Computing method: dense¶

The method chooses first $$k$$ feature vectors from the training set $$X$$.

Usage example¶

Computing¶

table run_compute(const table& data) {
const auto kmeans_desc = kmeans_init::descriptor<float,
kmeans_init::method::dense>{}
.set_cluster_count(10)

const auto result = compute(kmeans_desc, data);

print_table("centroids", result.get_centroids());

return result.get_centroids();
}


Examples¶

Batch Processing:

Batch Processing: