# Use Autocovariances in a sentence

1. This is a generalization of longhor1 in which a vector autoregression rather than an autoregression is used to compute Autocovariances of the variables whose lags are in X t − 1.In the exchange rate example (2), one might suppose that sharper estimates of the moments of i t − i t ∗ will result from use

Autoregression, An, Autocovariances, Are

2. It is thus more convenient to use the autocorrelations, which are the Autocovariances normalised by dividing by the variance (6.6) The series τ s now has the standard property of correlation coefficients that the values are bounded to lie between ±1

Autocorrelations, Are, Autocovariances

3. It seems that I still do not understand properly how ACF works My R calculations > a1 [1] 5.0 1.5 2.0 3.5 1.0 Autocovariances of series ‘a1’, by lag 0 1 2 3 4 2

Acf, Autocovariances

4. All the Autocovariances and autocorrelations are zero beyond displacement zero since white noise is uncorrelated over time

All, Autocovariances, And, Autocorrelations, Are

5. Which shows that the Autocovariances depend on lag, but not on time

Autocovariances

6. Consider the weighted average: Yon=h,x, +hx-1++hxc-n n a) Show that for y the Autocovariances are given by: 7;=22hhyx+ where y, is the j'th autocovariance of x

Average, Autocovariances, Are, Autocovariance

7. Shapes of stationary Autocovariances - Volume 43 Issue 4

Autocovariances

8. Hierarchical Clustering for Smart Meter Electricity Loads Based on Quantile Autocovariances Abstract: In order to improve the efficiency and sustainability of electricity systems, most countries worldwide are deploying advanced metering infrastructures, and in particular household smart meters, in the residential sector.

9. Many of the fundamental results in time series analysis depend on the joint asymptotic normality of a fixed number m of the sample Autocovariances

Analysis, Asymptotic, Autocovariances

10. In this paper a Berry‐Esseen type result is proved for m(n) Autocovariances for m growing at a certain rate.

Autocovariances, At

11. 1 day ago · In finance, academics use Autocovariances as a measure of bond/stock illiquidity

12. Abstract The problem of testing for the equality of Autocovariances of two independent high-dimensional time series is studied. Tests based on the suprema or sums of suitable averages across the dimensions are adapted from the available literature

Abstract, Autocovariances, Averages, Across, Are, Adapted, Available

13. The method of splitting – essentially computing Autocovariances by convolving long memory and short memory dynamics – is only tractable when a single long memory pole exists

Autocovariances, And

14. Theorem tells that for a stationary process with absolutely summable Autocovariances, we can write it as a weighted sum of periodic functions

Absolutely, Autocovariances, As

15. We propose an extension called mdSOBI by using multidimensional Autocovariances, which can be cal- culated for data sets with multidimensional parameterizations such as images or fMRI scans. mdSOBI has the advantage of using the spatial data in all directions, whereas SOBI only uses a …

16. The estimator is a linear function of the usual sample Autocovariances computed using the observed demeaned data

Autocovariances

17. The idea is to stack the usual sample Autocovariances into a vector and show that the expectation of this vector is a linear combination of population Autocovariances.

Autocovariances, And

18. Shapes of stationary Autocovariances 1187 TheACF ρ(·) is said to be new better than used if ρ(i+j)≤ ρ(i)ρ(j), i,j+j)≤ ρ(i)ρ(j), i,j

Autocovariances

19. Quantile Autocovariances provide information about the serial dependence structure at different pairs of quantile levels, require no moment condition and allow to identify dependence features that covariance-based methods are unable to detect

Autocovariances, About, At, And, Allow, Are

20. The multivariate portmanteau test proposed by Hosking (1980) for testing the adequacy of an autoregressive moving average model is based on the first s residual Autocovariances of the fitted model.In practice a value for s is chosen in dependence on the sample size n, mostly s = 20 for n between 50 and 200.

Adequacy, An, Autoregressive, Average, Autocovariances, And

21. Stat 8054 Lecture Notes: Autocovariances in MCMC Charles J

Autocovariances

22. Although the recursive formula for the Autocovariances is well-known, the initialization of this recursion in standard treatments (such as Brockwell and Davis (1991) or Lütkepohl (2007)) is slightly nuanced; we provide explicit formulas and algorithms for the initial Autocovariances.

Although, Autocovariances, As, And, Algorithms

23. All the proposed approaches take advantage of the high capability of the quantile Autocovariances to discriminate between independent realizations from a broad range of stationary processes, including linear, non-linear and conditional heteroskedastic models.

24. This article studies tests for assessing whether two stationary and independent time series have the same dynamics – specifically, whether the Autocovariances of both series coincide at all lags

Article, Assessing, And, Autocovariances, At, All

25. 5 Asymptotic Variance and Autocovariances

Asymptotic, And, Autocovariances

26. Autocovariances of long-memory time series 407 We assume ∞ j=0 ψ2(j)<∞

Autocovariances, Assume

27. The problem of testing for the equality of Autocovariances of two independent high-dimensional time series is studied

Autocovariances

28. Is the Use of Autocovariances in Level the Best in Estimating the Income Processes? A Simulation Study Tak Wai Chau * School of Economics Shanghai University of Finance and Economics 777, Guoding Road, Yangpu District Shanghai, 200433 China Abstract In this simulation study, I compare the efficiency and finite sample bias of param-eter estimators for popular income dynamic models using …

Autocovariances, And, Abstract

29. Limit the number of Autocovariances returned

Autocovariances

30. Setting nlag when fft is False uses a simple, direct estimator of the Autocovariances that only computes the first nlag + 1 values

Autocovariances

31. This can be much faster when the time series is long and only a small number of Autocovariances are needed

And, Autocovariances, Are

32. The tables consist of theoretical Autocovariances calculated using the methods described earlier

Autocovariances

33. We suggest using a bound for ARMA Autocovariances, setting m as follows: given j; m is the value such that c cðhÞ < 1 Â 10 Àj 8 h : jhj > m; jP6.

Arma, Autocovariances, As

34. Autocovariances are a fundamental quantity of interest in Markov chain Monte Carlo (MCMC) simulations with autocorrelation function (ACF) plots being an integral visualization tool for performance assessment

Autocovariances, Are, Autocorrelation, Acf, An, Assessment

35. If x is an M × N matrix, then xcov (x) returns a (2M – 1) × N2 matrix with the Autocovariances and cross-covariances of the columns of x

An, Autocovariances, And

36. When fft is False uses a simple, direct estimator of the Autocovariances that only computes the first nlag + 1 values

Autocovariances

37. This can be much faster when the time series is long and only a small number of Autocovariances are needed

And, Autocovariances, Are

38. In this question, we derive the Autocovariances of an AR(1) process using the Yule-Walker equation:s (a) Recall that AR(1) can be written as From these expressions, derive or (b) From the MA representation, show that a2 for j 0 for j 1,2, (c) Derive the Yule-Walker equations (d) Calculate (70, ?1, ) from equations in (c)

Autocovariances, An, Ar, As

39. A Note on Calculating Autocovariances of Periodic ARMA Models

Autocovariances, Arma

40. To estimate the spectrum width from 0,1-lag Autocovariances, the noise power N needs to be subtracted from the signal power (at lag 0) as seen in

Autocovariances, At, As

41. Autocovariances are not assumed zero, because we do not process the data with the optimal ﬁlter, which is unknown

Autocovariances, Are, Assumed

42. March 2018 Multivariate integer-valued time series with flexible Autocovariances and their application to major hurricane counts

Autocovariances, And, Application

43. If x is an M × N matrix, then xcov(x) returns a (2M – 1) × N 2 matrix with the Autocovariances and cross-covariances of the columns of x

An, Autocovariances, And