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      Quantile
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      Quantile

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      Article summary

      General: Quantile

      Groups data into a specified number of segments, where each segment contains the same number of records.

      Purpose

      Use this function to:
      • Group data into relative ranks
      • Create percentiles, quartiles etc

      Return Value

      PropertyValue
      FieldTypeInteger
      FieldSizeLow
      DataTypeContinuous
      DataSizeByte


      Example Return Value: 1.....S where S is the number of segments.

      Parameters

      ParameterJSONDescription
      Table“targetTable”: “MyTableName”The target table on which the new field will be created
      Filter“dataset”: {DataSet_JSON}Optional.   If a filter is applied, records not in the filter recordset will be returned as null.
      Function"function":"quantile"Quantile
      Quantile Field“p1”: “QuantileFieldName”Required.
      Supports:  
      • DataType: Discrete
      • FieldType:  Numeric
      The field to use when sorting data into quantile segments.
      Quantile field is sorted using an alphanumeric sort before being allocated into segments.
      Elements“p2”:"NumberofElements"Required. 
      Supports:  
      • Fixed Value:  2....250
      Determines the number of equal segments that will be created.
      10,20,50 and 100 are available as a drop down.
      To specify a different number, type in a number between 2 and 250
      e.g. 7

      JSON Sample

      {
  "method": "BuildBakedField",
  "project": "D3",
  "targetTable": "transactions",
  "overwrite": true,
  "name": "price_decile",
  "function": "quantile",
  "p1": "price",
  "p2": "10"
}

      Usage Notes

      Quantiles are one of the more processing intensive of engineering functions so may take a little longer than others to execute.

      See Also:   

      • Engineering | Expression Field
      • Engineering | Decodes
      • Engineering | Banded Fields

      Example

      ExampleDetails
      DescriptionCreate an income decile
      Input
      • Table: = [transactions]
      • Filter: = [No Filter]
      • Function: = Quantile
      • Quantile Field:= income
      • Elements:-10
      • Name: =income_decile
      Sample




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