RangeStdev() finds the standard deviation of a range of numbers.
Syntax:
RangeStdev(first_expr[, Expression])
Return data type: numeric
Arguments:
The arguments of this function may contain inter-record functions which in themselves return a list 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 |
|---|---|
| RangeStdev (1,2,4) |
Returns 1.5275252316519 |
| RangeStdev (null( )) |
Returns NULL |
| RangeStdev (above(SalesValue),0,3)) |
Returns a sliding standard of the range of three values returned from the above() function calculated on the current row and the two rows above the current row. |
Data used in example:
| CustID | RangeStdev(SalesValue, 0,3)) |
|---|---|
| 1-20 |
-,43.841, 34.192, 18.771, 20.953, 41.138, 47.655, 36.116, 32.716, 25.325, 38,000, 27.737, 35.553, 33.650, 42.532, 33.858, 32.146, 25.239, 35.595 |
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
] ;