Excerpt 

Computes an approximation for a specified quartile across all row values in a column or group. Input column can be of Integer or Decimal. 
Quartiles are computed as follows:
Quartile  Description 

0  Minimum value 
1  25th percentile 
2  Median value 
3  75th percentile and higher 
D lang syntax 

RawWrangle  true 

Type  ref 

showNote  true 

WrangleText  pivot value:approximatequartile(myScores, 25) group:postal_code limit:1 


approximatequartile(myScores, 3) 
Output: Computes the approximate value that is at the 3rd quartile across all values in the myScores column.
D lang syntax 

RawWrangle  true 

Type  syntax 

showNote  true 

WrangleText  pivot value:approximatequartile) [group:group_col_ref] [limit:limit_count] 


approximatequartile(function_col_ref,num_quartile) [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 
num_quartile  Y  integer  Integer value (03) of the quartile to compute 
dec_error_bound  N  decimal  Error factor for computing approximations. Decimal value represents error factor as a percentage (0.4 is 0.4%). 
For more information on the group
and limit
parameters, see Pivot Transform.
function_col_ref
Name of the column the values of which you want to calculate the quartile. Column must contain Integer or Decimal values.
 Literal values are not supported as inputs.
 Multiple columns and wildcards are not supported.
Required?  Data Type  Example Value 

Yes  String (column reference)  precipitationIn 
num_quartile
Integer literal value indicating the quartile that you wish to compute. Input value must be between 0
and 3
, inclusive.
 Column or function references are not supported.
 Multiple columns and wildcards are not supported.
Required?  Data Type  Example Value 

Yes  Integer  3 
dec_error_bound
As needed, you can insert an error boundary factor as a parameter into the computation of this approximate value.
This value must be a Decimal literal value. This decimal value represents the percentage error factor. By default, this value is
0.5
(0.5%).
Required?  Data Type  Example Value 

No  Decimal (literal)  0.01 
Example  Percentile functions
Include Page 

 EXAMPLE  Percentile Functions 

 EXAMPLE  Percentile Functions 

