TDIGEST.TRIMMED_MEAN
Syntax
TDIGEST.TRIMMED_MEAN key low_cut_quantile high_cut_quantile
- Available in:
- Redis CE / Bloom 2.4.0
- Time complexity:
- O(N) where N is the number of centroids
- ACL categories:
-
@tdigest,@read,
Returns an estimation of the mean value from the sketch, excluding observation values outside the low and high cutoff quantiles.
Required arguments
key
is key name for an existing t-digest sketch.
low_cut_quantile
Foating-point value in the range [0..1], should be lower than high_cut_quantile
When equal to 0: No low cut.
When higher than 0: Exclude observation values lower than this quantile.
high_cut_quantile
Floating-point value in the range [0..1], should be higher than low_cut_quantile
When lower than 1: Exclude observation values higher than or equal to this quantile.
When equal to 1: No high cut.
Return value
Simple string reply estimation of the mean value. 'nan' if the sketch is empty.
Examples
redis> TDIGEST.CREATE t COMPRESSION 1000
OK
redis> TDIGEST.ADD t 1 2 3 4 5 6 7 8 9 10
OK
redis> TDIGEST.TRIMMED_MEAN t 0.1 0.6
"4"
redis> TDIGEST.TRIMMED_MEAN t 0.3 0.9
"6.5"
redis> TDIGEST.TRIMMED_MEAN t 0 1
"5.5"