Given an AR(p,q) realization, this function estimates the white noise estimates using equation 6.23 (from the text book)

Given an AR(p,q) realization, this function estimates the white noise estimates using equation 6.23 (from the text book)

compute_a(x, phi, theta, index)

Arguments

x	time series realization
phi	phi values of the time series
theta	theta values of the time series
index	time value till which the white noise estimates are needed

Value

All white noise estimates till the index