Sample

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The sample transform filters random rows from the data source to reduce its size. As input data objects are added and removed, the sampled values may change in first-in, first-out manner. This transform uses reservoir sampling to maintain a representative sample of the stream.

Sample Transform Definition

Property Type Description
sample Number

Required. The maximum number of data objects to include in the sample.

Default value: 1000

Usage

{"sample": 500}

Filters a data stream to a random sample of at most 500 data objects.

Example

Comparison between plots of the complete data and sampled data.