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Correlations and variance?

  1. Apr 22, 2009 #1

    Shaddyab

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    What is the difference between Auto-correlation and auto-variance?
    The same for cross-correlation and cross-variance?
     
    Shaddyab, Apr 22, 2009
  2. jcsd
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  3. Apr 22, 2009 #2

    mathman

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    The essential difference in both cases is a matter of normalization. The correlations are obtained from the cross- or co- variances by dividing by the square root of the product of the variances of the individual variables being correlated. As a result the correlations are limited in magnitude to be between 0 and 1.
     
    mathman, Apr 22, 2009
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