Topic: Example Autocorrelation Autocorrelation
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What is autocorrelation?
( ¦öd·ō′kär·ə′lā·shən ) (electronics) A technique used to detect cyclic activity in a complex signal. (statistics) In a time series, the relationship between values of a variable taken at certain times in the series and values of a variable... Read More »
Source: http://www.answers.com/topic/autocorrelation-1
How to Plot Autocorrelation in SPSS
The Statistical Package for the Social Sciences (SPSS) is a program designed by IBM to help students and professionals analyze data for research projects. Once your data is entered into SPSS, you can display useful charts and graphs. SPSS i... Read More »
Source: http://www.ehow.com/how_8743105_plot-autocorrelation-spss.html
How to Calculate Autocorrelation
Instructions Calculate the autocovariance for a time series. The autocovariance compares the time series to itself. Let S stand for the summation symbol sigma, N for the number of points in the data set, and m for the time lag. The time lag... Read More »
Source: http://www.ehow.com/how_6168453_calculate-autocorrelation.html?re...
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Example Autocorrelation Autocorrelation
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( ¦öd·ō′kär·ə′lā·shən ′fuŋk·shən ) (mathematics) For a specified functionf(t), the average value of the productf(t)f(t - τ), where τ is a time-delay parameter; more precisely, the limit as T approaches infinity of 1/(2T) times the integral ...
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Source: http://www.answers.com/topic/autocorrelation-function
Variant: PACF A measure of autocorrelation at log k that takes account of the autocorrelation at lags less than k. The plot of the PACF can be a useful guide to the appropriate order of an autoregressive time series.
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Source: http://www.answers.com/topic/partial-autocorrelation-function
( ′spā·shəl ¦öd·ō′kä·rə′lā·shən ) (geography) In mathematical geography, the degree of interdependence among data arranged on a three-dimensional grid.
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Source: http://www.answers.com/topic/spatial-autocorrelation
Yah, I can't edit my comments, so I'll just post a response here... If you autocorrelate an interval of sin(x), you get a simple, finite result. I want to correlate the interval from negative infinity to infinity. Like you said, at 0, 2pi, ...
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Source: http://www.answerbag.com/q_view/616247
A sequence of variables in which each variable has a different variance. Heteroscedastics may be used to measure the margin of the error between predicted and actual data.
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Source: http://wiki.answers.com/Q/What_is_heteroscedasticity_and_autocorr...
As far as I know: " Time Series Analysis and Its Applications " first chapter
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Source: http://wiki.answers.com/Q/Which_is_the_best_book_to_study_autocor...
