TDIGEST.QUANTILE
Syntax
TDIGEST.QUANTILE key quantile [quantile ...]
- Available in:
- Redis Stack / Bloom 2.4.0
- Time complexity:
- O(1)
Returns, for each input fraction, an estimation of the value (floating point) that is smaller than the given fraction of observations.
Multiple quantiles can be retrieved in a signle call.
Required arguments
key
is key name for an existing t-digest sketch.
quantile
is the input fraction (between 0 and 1 inclusively)
Return value
Array reply - an array of estimates (floating-point) populated with value_1, value_2, ..., value_N.
- Return an accurate result when
quantile
is 0 (the value of the smallest observation) - Return an accurate result when
quantile
is 1 (the value of the largest observation)
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.QUANTILE t 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
1) "1"
2) "2"
3) "3"
4) "3"
5) "4"
6) "4"
7) "4"
8) "5"
9) "5"
10) "5"
11) "5"