RangeSkew() returns the value corresponding to the skewness of a range of numbers.
Syntax:
RangeSkew(first_expr{,Expression})
Return data type: numeric
Arguments:
The argument expressions of this function may contain inter-record functions with a third optional parameter, which in themselves return a range of values.
| Argument | Description |
|---|---|
| first_expr | The expression or field containing the data to be measured. |
| Expression | Optional expressions or fields containing the range of data to be measured. |
Limitations:
If no numeric value is found, NULL is returned.
Examples and results:
| Examples | Results |
|---|---|
| rangeskew (1,2,4) | Returns 0.93521952958283 |
| rangeskew (above(count(x),0,3)) |
Returns a sliding skewness of the result of the inner count(x) expression calculated on the current row and two rows above the current row. |
Data used in example:
| CustID | RangeSkew(SalesValue, Above(SalesValue, Above(Above(SalesValue))) |
|---|---|
| 1-20 |
-, -, 0.5676, 0.8455, 1.0127, -0.8741, 1.7243, -1.7186, 1.5518, 1.4332, 0, 1.1066, 1.3458, 1.5636, 1.5439, 0.6952, -0.3766 |
SalesTable:
LOAD recno() as CustID, * inline [
SalesValue
101
163
126
139
167
86
83
22
32
70
108
124
176
113
95
32
42
92
61
21
] ;
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