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dqe
0.4.13
0.4.15
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0.1.20
0.1.10
0.1.9
DalmatinerDB query engine
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src/dqe_log10_scale_trans.erl
-module(dqe_log10_scale_trans).
-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, {
}).
init([]) ->
#state{}.
chunk(#state{}) ->
?RDATA_SIZE.
resolution(_Resolution, State) ->
{1, State}.
describe(#state{}) ->
["log10_scale()"].
spec() ->
{<<"log10_scale">>, [metric], none, metric}.
run([Data], S = #state{}) ->
{mmath_trans:log10_scale(Data), S}.
help() ->
<<"Calculates the log10 of each element. For convinience: ",
"log10_scale(0) = 0, log10_scale(-N) = - log10_scale(N).">>.