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| Excerpt |
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Extracts the ranked unique value from the values in a column, where |
For purposes of this calculation, two instances of the same value are treated as the same value of k. So, if your dataset contains four rows with column values 10, 9, 9, and 8, then KTHLARGEST returns 9 for k=2 and 8 for k=3.
- For a non-unique version of this function, see KTHLARGEST Function.
When used in a pivot transform, the function is computed for each instance of the value specified in the group parameter. See Pivot Transform.
Input column can be of Integer or Decimal type. Non-numeric data in the column is ignored. If a row contains a missing or null value, it is not factored into the calculation.
D s snippet Basic
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pivot value:KTHLARGESTUNIQUE(myRating, 3) group:postal_code limit:1 |
Output: Generates a two-column table containing the unique values in the postal_code column and the third highest unique value from the myRating column for that postal_code value. The limit parameter defines the maximum number of output columns.
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| D code |
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pivot value:KTHLARGESTUNIQUE(function_col_ref, k_integer) [group:group_col_ref] [limit:limit_count] |
| Argument | Required? | Data Type | Description |
|---|---|---|---|
| function_col_ref | Y | string | Name of column to which to apply the function |
| k_integer | Y | integer (positive) | The ranking of the unique value to extract from the source column |
For more information on the group and limit parameters, see Pivot Transform.
| D s lang notes |
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function_col_ref
Name of the column the values of which you want to calculate the mean. Column must contain Integer or Decimal values.
- Literal values are not supported as inputs.
- Multiple columns and wildcards are not supported.
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| Required? | Data Type | Example Value |
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| Yes | String (column reference) | myValues |
k_integer
Integer representing the ranking of the unique value to extract from the source column. Duplicate values are treated as a single value for purposes of this function's calculation.
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NOTE: The value for |
k=1represents the maximum value in the column.- If k is greater than or equal to the number of values in the column, the minimum value is returned.
- Missing and null values are not factored into the ranking of
k.
D s snippet usage
| Required? | Data Type | Example Value |
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| Yes | Integer (positive) | 4 |
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Include Page EXAMPLE - KTHLARGEST Function EXAMPLE - KTHLARGEST Function
D s also label aggregate
