private void CreateRenderingOptions()
{
renderingOptions = null;
if (dataSet != null)
{
renderingOptions = new RenderingOptions();
renderingOptions.MinValue = double.MaxValue;
renderingOptions.MaxValue = double.MinValue;
int startIndex = (dataSet.Length < DataPointCount) ? 0 : dataSet.Length - DataPointCount;
for (int i = startIndex; i < dataSet.Length; i++)
{
renderingOptions.MinValue = Math.Min(dataSet[i].HeartRateValue, renderingOptions.MinValue);
renderingOptions.MaxValue = Math.Max(dataSet[i].HeartRateValue, renderingOptions.MaxValue);
}
}
}