TDIGEST.BYRANK

TDIGEST.BYRANK key rank [rank ...]

Available in:

Redis Stack / Bloom 2.4.0

Time complexity:

O(N) where N is the number of ranks specified.

Returns, for each input rank, an estimation of the value (floating-point) with that rank.

Multiple estimations can be retrieved in a signle call.

Required arguments

Return value

Array reply - an array of floating-points populated with value_1, value_2, ..., value_R:

• Return an accurate result when rank is 0 (the value of the smallest observation)
• Return an accurate result when rank is n-1 (the value of the largest observation), where n denotes the number of observations added to the sketch.
• Return 'inf' when rank is equal to n or larger than n

All values are 'nan' if the sketch is empty.

Examples

redis> TDIGEST.CREATE t COMPRESSION 1000
OK
redis> TDIGEST.ADD t 1 2 2 3 3 3 4 4 4 4 5 5 5 5 5
OK
redis> TDIGEST.BYRANK t 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
 1) "1"
 2) "2"
 3) "2"
 4) "3"
 5) "3"
 6) "3"
 7) "4"
 8) "4"
 9) "4"
10) "4"
11) "5"
12) "5"
13) "5"
14) "5"
15) "5"
16) "inf"