kmeans function performs 2D k-means clustering. 2D k-means clustering can be used to visualize patterns within 2D scatter plots. The
kmeans function takes three parameters:
The numeric field for the first dimension.
The numeric field for the second dimension.
K or number of clusters.
select kmeans(petal_length_d, petal_width_d, 5) as cluster, petal_length_d, petal_width_d from iris limit 150
The result set contains a random sample of records that match the
WHERE clause. If no
WHERE clause is included the random sample will be taken from the entire result set. The size of the random sample can be controlled by the
LIMIT clause. The default sample size, if no limit is applied, is 25,000.
kmeans function returns the cluster name of each row in the result set. The two fields used for clustering are also available in the result set.
Sample visualization of kmeans cluster with Apache Zeppelin scatter plot.