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dqe
0.3.9
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
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src/dqe_derivate.erl
-module(dqe_derivate).
-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{}) ->
["derivate()"].
spec() ->
{<<"derivate">>, [metric], none, metric}.
run([Data], S = #state{}) ->
{mmath_trans:derivate(Data), S}.
help() ->
<<"Calculates the derivate of a series so that v(t) = v(t - 1) - v(t). As "
"this loses one element of the series the first element v(0) and v(1) "
"are always equal.">>.