RangeNullCount - script and chart function

RangeNullCount() finds the number of NULL values in the expression or field.

Syntax:  

RangeNullCount(firstexpr [, Expression])

Return data type: integer

Arguments:  

The argument 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.

Examples and results:  

Examples Results
RangeNullCount (1,2,4)

Returns 0

RangeNullCount (5,'abc') Returns 0
RangeNullCount (null( ), null( ))

Returns 2

Example with expression:

RangeNullCount (Above(Sum(MyField),0,3))

Returns the number of NULL values in the three results of the Sum(MyField) function evaluated on the current row and two rows above the current row.

Note: Copying MyField in example below will not result in NULL value.
MyField RangeNullCount(Above(Sum(MyField),0,3))
10 Returns 2 because there are no rows above this row so 2 of the 3 values are missing (=NULL).
'abc' Returns 1 because there is only one row above the current row, so one of the three values is missing (=NULL).
8 Returns 0 because none of the three rows is a NULL value.

Data used in examples:

RangeTab:

LOAD * INLINE [

MyField

10

'abc'

8

] ;

See also: