1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/PTdecode/CImg-1.3.0/html/reference/formula.repository Mon Aug 03 14:09:20 2009 +0100 1.3 @@ -0,0 +1,3 @@ 1.4 +\form#0:$ v = 1/N \sum\limits_{k=1}^{N} (x_k - \bar x)^2 = 1/N \left( \sum\limits_{k=1}^N x_k^2 - \left( \sum\limits_{k=1}^N x_k \right)^2 / N \right) $ 1.5 +\form#1:$ \bar x = 1/N \sum\limits_{k=1}^N x_k $ 1.6 +\form#2:$ v = \frac{1}{N-1} \sum\limits_{k=1}^{N} (x_k - \bar x)^2 $