Packages
dqe
0.3.13
0.4.15
0.4.14
0.4.13
0.4.12
0.4.11
0.4.10
0.4.9
0.4.8
0.4.7
0.4.6
0.4.5
0.4.4
0.4.3
0.4.2
0.4.1
0.4.0
0.3.25
0.3.24
0.3.23
0.3.22
0.3.21
0.3.20
0.3.19
0.3.18
0.3.17
0.3.16
0.3.15
0.3.14
0.3.13
0.3.12
0.3.11
0.3.10
0.3.9
0.3.8
0.3.7
0.3.6
0.3.5
0.3.4
0.3.3
0.3.2
0.3.1
0.2.2
0.2.1
0.2.0
0.1.36
0.1.35
0.1.34
0.1.33
0.1.22
0.1.21
0.1.20
0.1.10
0.1.9
DalmatinerDB query engine
Current section
Files
Jump to
Current section
Files
src/dqe_hist_percentile.erl
-module(dqe_hist_percentile).
-behaviour(dqe_fun).
-include_lib("mmath/include/mmath.hrl").
-export([spec/0, describe/1, init/1, chunk/1, resolution/2, run/2, help/0]).
-record(state, {percentile}).
init([Percentile]) ->
#state{percentile = Percentile}.
chunk(#state{}) ->
1.
resolution(_Resolution, State) ->
{1, State}.
describe(#state{percentile = Percentile}) ->
["percentile(", float_to_list(Percentile), ")"].
spec() ->
{<<"percentile">>, [histogram, float], none, metric}.
run([Data], S = #state{percentile = Percentile}) ->
R = mmath_bin:from_list([hdr_histogram:percentile(H, Percentile) || H <- Data]),
{R, S}.
help() ->
<<"Calculates the percentile value for a histogram.">>.