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iss #60 - Added processing functions for downsampling: min, max, avg.

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This commit is contained in:
Alexander Zobnin
2015-08-11 21:55:26 +03:00
parent 377ea8281f
commit 221d42c172
4 changed files with 67 additions and 18 deletions
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23
zabbix/helperFunctions.js
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@@ -216,12 +216,12 @@ function (angular, _) {
/**
* Downsample datapoints series
*
* @param {array} datapoints [[<value>, <unixtime>], ...]
* @param {Object[]} datapoints [[<value>, <unixtime>], ...]
* @param {integer} time_to Panel time to
* @param {integer} ms_interval Interval in milliseconds for grouping datapoints
* @return {array} [[<value>, <unixtime>], ...]
* @return {Object[]} [[<value>, <unixtime>], ...]
*/
this.downsampleSeries = function(datapoints, time_to, ms_interval) {
this.downsampleSeries = function(datapoints, time_to, ms_interval, func) {
var downsampledSeries = [];
var timeWindow = {
from: time_to * 1000 - ms_interval,
@@ -231,14 +231,28 @@ function (angular, _) {
var points_sum = 0;
var points_num = 0;
var value_avg = 0;
var frame = [];
for (var i = datapoints.length - 1; i >= 0; i -= 1) {
if (timeWindow.from < datapoints[i][1] && datapoints[i][1] <= timeWindow.to) {
points_sum += datapoints[i][0];
points_num++;
frame.push(datapoints[i][0]);
}
else {
value_avg = points_num ? points_sum / points_num : 0;
downsampledSeries.push([value_avg, timeWindow.to]);
if (func === "max") {
downsampledSeries.push([_.max(frame), timeWindow.to]);
}
else if (func === "min") {
downsampledSeries.push([_.min(frame), timeWindow.to]);
}
// avg by default
else {
downsampledSeries.push([value_avg, timeWindow.to]);
}
// Shift time window
timeWindow.to = timeWindow.from;
@@ -246,6 +260,7 @@ function (angular, _) {
points_sum = 0;
points_num = 0;
frame = [];
// Process point again
i++;