Time Series API Reference

RollingWindow(samples::Int,windowsize::Int,skip::Int)

Creates a RollingWindow iterator from a number of samples and a static windowsize where every iteration skip steps are skipped. The iterator can be used in for loops to iteratively return indices of a dynamic rolling window.

RollingWindow(samples::Int,windowsize::Int)

Creates a RollingWindow iterator from a number of samples and a static windowsize. The iterator can be used in for loops to iteratively return indices of a dynamic rolling window.

EWMA(Initial::Float64, Lambda::Float64) = ewma(Lambda, Initial, Initial, RunningVar(Initial))

Constructs an exponentially weighted moving average object from an vector of scalar property values Initial and the decay parameter Lambda. This computes the running statistcs neccesary for creating the EWMA model using the interval provided and updates the center value to the mean of the provided values.

EWMA(Initial::Float64, Lambda::Float64) = ewma(Lambda, Initial, Initial, RunningVar(Initial))

Constructs an exponentially weighted moving average object from an initial scalar property value Initial and the decay parameter Lambda. This defaults the center value to be the initial value.

Limits(P::ewma; k = 3.0)

This function returns the upper and lower control limits with a k span of variance for an EWMA object P.

Variance(P::ewma)

This function returns the EWMA control variance.

EWMA(P::ewma)(New; train = true)

Provides an EWMA score for a New scalar value. If train == true the model is updated to include this new value.

ChangeCenter(P::ewma, new::Float64)

This is a convenience function to update the center of a P EWMA model, to a new scalar value.