public abstract static class TDigestQuantiles.GlobalDigest
extends org.apache.beam.sdk.transforms.PTransform<org.apache.beam.sdk.values.PCollection<java.lang.Double>,org.apache.beam.sdk.values.PCollection<com.tdunning.math.stats.MergingDigest>>
TDigestQuantiles.globally()
.Constructor and Description |
---|
GlobalDigest() |
Modifier and Type | Method and Description |
---|---|
org.apache.beam.sdk.values.PCollection<com.tdunning.math.stats.MergingDigest> |
expand(org.apache.beam.sdk.values.PCollection<java.lang.Double> input) |
TDigestQuantiles.GlobalDigest |
withCompression(double cf)
Sets the compression factor
cf . |
addAnnotation, compose, compose, getAdditionalInputs, getAnnotations, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, populateDisplayData, setDisplayData, setResourceHints, toString, validate, validate
public TDigestQuantiles.GlobalDigest withCompression(double cf)
cf
.
Keep in mind that a compression factor cf
of c guarantees a relative error less
than 3/c at mid quantiles.
The accuracy will always be significantly less than 1% at extreme quantiles.
cf
- the bound value for centroid and digest sizes.public org.apache.beam.sdk.values.PCollection<com.tdunning.math.stats.MergingDigest> expand(org.apache.beam.sdk.values.PCollection<java.lang.Double> input)
expand
in class org.apache.beam.sdk.transforms.PTransform<org.apache.beam.sdk.values.PCollection<java.lang.Double>,org.apache.beam.sdk.values.PCollection<com.tdunning.math.stats.MergingDigest>>