Sample

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.

// Any View Specification
{
  ...
  "transform": [
    {"sample": ...} // Sample Transform
     ...
  ],
  ...
}

Sample Transform Definition

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.