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Skew - script function

Skew() returns the skewness of expression over a number of records as defined by a group by clause.

Syntax:  

Skew([ distinct] expr)

Return data type: numeric

Arguments:  

Arguments
Argument Description
expr The expression or field containing the data to be measured.
DISTINCT If the word distinct occurs before the expression, all duplicates will be disregarded.

Examples and results:  

Add the example script to your app and run it. Then build a straight table with Type and MySkew as dimensions.

Resulting data
Example Result 
Table1:
Crosstable (Type, Value)
Load recno() as ID, * inline [
Observation|Comparison
35|2
40|27
12|38
15|31
21|1
14|19
46|1
10|34
28|3
48|1
16|2
30|3
32|2
48|1
31|2
22|1
12|3
39|29
19|37
25|2 ] (delimiter is '|');
 

Skew1:

LOAD Type,

Skew(Value) as MySkew

Resident Table1 Group By Type;

 

The results of the Skew() calculation are:

  • Type is MySkew
  • Comparison is 0.86414768
  • Observation is 0.32625351

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