public void TestExample()
{
double[] x = new[] { 1.0, 2.0, 3.0 };
double[] y = new[] { 3.0, 5.0, 6.5 };
var trendline = new Trendline(x, y);
Assert.That(Math.Round(trendline.GetY(0.0), 3), Is.EqualTo(1.333));
Assert.That(Math.Round(trendline.GetY(3.14), 3), Is.EqualTo(6.828));
}
public void TestLinear()
{
// y = 2x + 1
double[] x = new[] { 1.0, 2.0, 3.0 };
double[] y = new[] { 3.0, 5.0, 7.0 };
var trendline = new Trendline(x, y);
Assert.That(trendline.GetX(0.0), Is.EqualTo(-0.5));
Assert.That(trendline.GetY(0.0), Is.EqualTo(1.0));
Assert.That(trendline.GetY(137.23), Is.EqualTo(275.46));
}
private static object GetTimeRemaining(ModelBase model)
{
var viewModel = (ProgressFieldViewModel)model;
if (viewModel.Target == 0)
{
return(TimeSpan.MaxValue);
}
if (viewModel._progressStart == null)
{
viewModel._progressStart = DateTime.UtcNow;
return(TimeSpan.MaxValue);
}
var elapsed = DateTime.UtcNow - viewModel._progressStart.GetValueOrDefault();
var elapsedMilliseconds = elapsed.TotalMilliseconds;
lock (viewModel._elapsedSample)
{
if (elapsedMilliseconds - viewModel._elapsedSample[viewModel._sampleIndex] > (1000 / SampleCount))
{
viewModel._elapsedSample[viewModel._sampleIndex] = elapsedMilliseconds;
viewModel._progressSample[viewModel._sampleIndex] = (double)viewModel.Current;
viewModel._sampleIndex = (viewModel._sampleIndex + 1) % SampleCount;
var trendline = new Trendline(viewModel._progressSample, viewModel._elapsedSample);
viewModel._estimatedMilliseconds = trendline.GetY(viewModel.Target);
}
}
var remainingMilliseconds = viewModel._estimatedMilliseconds - elapsedMilliseconds;
return(TimeSpan.FromMilliseconds(remainingMilliseconds));
}
