/**
* Init data
* @param \Runalyze\Model\HRV\Object $hrv
*/
protected function initHRVData(Model\HRV\Object $hrv)
{
if (count($this->XAxisData) == $hrv->num()) {
$this->XAxis = DataCollector::X_AXIS_TIME;
$this->Data = array_combine($this->XAxisData, $this->filterData($hrv->data()));
} else {
$this->XAxis = DataCollector::X_AXIS_INDEX;
$this->Data = $this->filterData($hrv->data());
}
}
/**
* Collect plot data
*/
protected function collectPlotData()
{
$data = $this->Object->data();
$num = $this->Object->num();
for ($i = 1; $i < $num; ++$i) {
if (abs($data[$i - 1] - $data[$i]) < $this->Filter) {
$this->PlotData[(string) $data[$i - 1]] = $data[$i];
}
}
}
/**
* Calculate sdsd from mean of differences
* @param float $mean
*/
protected function calculateSDSDfromMean($mean)
{
$last = 0;
$sum = 0;
foreach ($this->Object->data() as $ms) {
if ($last) {
$x = abs($ms - $last);
$sum += ($x - $mean) * ($x - $mean);
}
$last = $ms;
}
$this->SDSD = sqrt($sum / ($this->Object->num() - 1));
}
