ApproximateQuantiles

Javadoc

Takes a comparison function and the desired number of quantiles n, either globally or per-key. Using an approximation algorithm, it returns the minimum value, n-2 intermediate values, and the maximum value.

Examples

Example: to compute the quartiles of a PCollection of integers, we would use ApproximateQuantiles.globally(5). This will produce a list containing 5 values: the minimum value, Quartile 1 value, Quartile 2 value, Quartile 3 value, and the maximum value.

Related transforms

• ApproximateUnique estimates the number of distinct elements or distinct values in key-value pairs
• Combine