The syntax for the inverse distribution functions family is as
follows:
width_bucket(<expression>,<beginning of range>, <end of range>,
<number of buckets>)
- width_bucket
- This function is used to create equi-width histograms. It takes
a range and divides it into equi-width intervals, where the number
of intervals is specified by num-buckets. It returns the bucket to
which the expression belongs. Each bucket is a half-closed interval
[a, b) on the real line.
- If the expression is less than the beginning, it is assigned to
an underflow bucket (zero).
- If the expression is greater than the end, it is assigned to the
bucket numbuckets+1.
- All the arguments evaluate to a numeric value and num-buckets
evaluate to an integral constant.
IBM PureData System for Analytics, Version 7.1