public static CommonOutputs.TransformOutput PercentileThresholdTransform(IHostEnvironment env, PercentileThresholdTransform.Arguments input)
{
var h = EntryPointUtils.CheckArgsAndCreateHost(env, "PercentileThresholdTransform", input);
var view = new PercentileThresholdTransform(h, input, input.Data);
return(new CommonOutputs.TransformOutput()
{
Model = new TransformModelImpl(h, view, input.Data),
OutputData = view
});
}
private protected override void TransformCore(ref Single input, FixedSizeQueue <Single> windowedBuffer, long iteration, ref Single dst)
{
int count;
int equalCount;
int totalCount;
PercentileThresholdTransform.CountGreaterOrEqualValues(windowedBuffer, input, out count, out equalCount, out totalCount);
count = (_parent._isPositiveSide) ? count : totalCount - count - equalCount;
dst = (Single)((count + _randomGen.NextDouble() * equalCount) / (totalCount + 1));
// Based on the equation in http://arxiv.org/pdf/1204.3251.pdf
}
private protected override void InitializeStateCore()
{
_parent = (PercentileThresholdTransform)ParentTransform;
}