RangeAvg - script and chart function

RangeAvg() returns the average of a range. Input to the function can be either a range of values or an expression.

Syntax:  

RangeAvg(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
RangeAvg (1,2,4)

Returns 2.33333333

RangeAvg (1,'xyz') Returns 1
RangeAvg (null( ), 'abc') Returns NULL

Add the example script to your app and run it. Then add, at least, the fields listed in the results column to a sheet in your app to see the result.

RangeTab3:

LOAD recno() as RangeID, RangeAvg(Field1,Field2,Field3) as MyRangeAvg INLINE [

Field1, Field2, Field3

10,5,6

2,3,7

8,2,8

18,11,9

5,5,9

9,4,2

];

The resulting table shows the returned values of MyRangeAvg for each of the records in the table.
RangeID MyRangeAvg
1 7
2 4
3 6
4 12.666
5 6.333
6 5

Example with expression:

RangeAvg (Above(MyField),0,3))

Returns a sliding average of the result of the range of three values of MyField calculated on the current row and two rows above the current row. By specifying the third argument as 3, the Above() function returns three values, where there are sufficient rows above, which are taken as input to the RangeAvg() function.

Data used in examples:

Tip: Disable sorting of MyField to ensure that example works as expected.
MyField RangeAvg (Above(MyField,0,3))  
10 10 Because this is the top row, the range consists of one value only.
2 6 There is only one row above this row, so the range is: 10,2.
8 6.6666666667 The equivalent to RangeAvg(10,2,8)
18 9.333333333  
5 10. 333333333  
9 10.6666666667  

RangeTab:

LOAD * INLINE [

MyField

10

2

8

18

5

9

] ;

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