Talk:Detrended fluctuation analysis

=Calculation= What is $$\langle x_i\rangle$$ in the following expression?
 * $$X_t=\sum_{i=1}^t (x_i-\langle x_i\rangle)$$

The mean value of one variable $$x_i$$, which would would be nothing else than $$x_i$$, or of $$x$$? Please correct this. Herrkami (talk) 14:13, 1 March 2014 (UTC)

=Calculation 2= The left-hand side of the equation
 * $$F( n ) = \sqrt{\frac{1}{N}\sum_{t = 1}^N \left( X_t - Y_t \right)^2}.$$

contains $$n$$ while the right-hand side doesn't. Actually, this doesn't even look right as a piecewise computation...