计盒分形维数计算的matlab源代码编程实现过程-Function [Fdgen NoisfreFD ]=fractaldim(y,Q,M)

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　Usage: Computes fractal dimension by box counting(BC) method.

　NOTE: Running the code may take a little time, because it calculates

　dimensions for all embedding dimensions up to M.

　This code is based on an algorithm that constructs a box for the first

　observation and for other observations test which it belongs to previous

　box(s). If the observation belongs to one of the existent boxes then

　increases number of points in the relevant box,otherwise makes a new box.　 the algorithm of this code uses only rounding down and it does not need

　 binary coding, sorting and so on. It uses only transformation data to　 [0,2^32-1] and finding valid boxes based on Leibovich and Toth(1989).　 Inputs:　 y is a vector time series.　 q stands for generalized dimension q=1 entropy dimension,q=2 correlation　 dimension and so on. q=0 is box counting dimen