dev-chiefworks
27 lines
795 B
PHP
27 lines
795 B
PHP
<?php
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defined('BASEPATH') or exit('No direct script access allowed');
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function variation($data, $i, $f, $t, &$dMin, &$dMax, &$tVar, &$tVar0)
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{
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$tVar[] = $f['cost'];
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$trend = $t[$f['time']][2];
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$delta = $f['cost'] - $trend;
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$variation = stats_variance($tVar);
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if ($delta>$dMax) $dMax = $delta;
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if ($delta<$dMin) $dMin = $delta;
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$tVar0[$f['time']] = $variation;
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/* {
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"travel_date":"2020-05-10 14:54:04+00",
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"cost":"12",
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"location_start_lat":"1.319292",
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"location_start_lng":"103.9126091",
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"location_end_lat":"1.316269",
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"location_end_lng":"103.977615",
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"origin":"Central East - Eunos",
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"destination":"Far East - Changi",
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"c":"#5555ff"} */
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//if ($i<5) error_log(json_encode($t));
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return [$trend, $delta, $variation];
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}
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