correlogram


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correlogram

[kə′rel·ə‚gram]
(mathematics)
A curve showing the assumed correlation between two mathematical variables. Also known as correlation curve.
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For the current study stationarity will be checked through time series plot of the stock prices along with series Correlogram - Autocorrelation Function (ACF) and Partial Autocorrelation Function (PACF) plots.
Malviya and Ladhake [16] proposed an image forensic technique for copy-move forgery detection, which employs the auto color correlogram, a tool successfully applied in image retrieval, to detect tampered region.
The noise correlation (the shift predictor-subtracted cross-correlogram) was calculated by subtracting the shift predictor correlogram (SC) from the RCC.
Results were not affected by number and definition of distance classes in the correlogram, and Moran's coefficient was not significant (P > 0.
Autoregressive integrated moving average (ARIMA) models: We first modeled fatalities time series, and the correlogram for the series is presented as Figure 3-A.
Moghaddam and Saadatmand-Tarzjan [27] proposed a Gabor Wavelet Correlogram (GWC) in CBIR, it improves wavelet correlogram using Gabor wavelets.
Analysis of the correlogram for the series, using the Ljung and Box test, allowed it to be concluded that up to the 26th observation we have a p value lower than 5%, leading us to conclude through rejection of the hypothesis that autocorrelation does not exist.
Furthermore, the analysis of electricity spot prices correlogram shows a strong autocorrelation in lags 7,14,21,28 indicating a weekly seasonality.
Applying the correlation between the series of the residues in the two equations related to the impulse responses and variance decomposition, the results are: the correlogram indicates values of autocorrelation functions within the band confidence.
Considering that the autocorrelation (AC) and partial autocorrelation (PAC) from the correlogram are slowly, not sharply, decaying towards zero, probably an ARMA model will describe best the evolution of the studied variable.
26) The problem of autocorrelation was observed which is dealt with by adding AR and MA terms in the regression after observing the correlogram [Prais and Winsten (1954); Pilli-Sihvola, et al.