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Detrended Fluctuation Analysis

02 May 2008 (Updated 05 May 2008)

Detrended Fluctuation Analysis,fractal analysis

File Information
Description	In stochastic processes, chaos theory and time series analysis, detrended fluctuation analysis (DFA) is a method for determining the statistical self-affinity of a signal. It is useful for analysing time series that appear to be long-memory processes. Reference: Peng C-K, Havlin S, Stanley HE, Goldberger AL. Quantification of scaling exponents and crossover phenomena in nonstationary heartbeat time series. Chaos 1995;5:82-87.
MATLAB release	MATLAB 7.1.0 (R14SP3)
Zip File Content
Other Files	DFA/DFA.m, DFA/DFA_main.m, DFA/Quantification of scaling exponents and crossover phenomena in nonstationary heartbeat time series..pdf, DFA/DATA1.mat, DFA/readme.txt

Tags for This File
Everyone's Tags	chaos, dear guan, detrended fluctuation analysis(2), dfa, fractal, fractals, order, order with which data have to enter date, selfaffinity, the function output function output1 dfa data, win_length
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Comments and Ratings (8)
13 Jul 2008	Srav U	this may be a stupid question...but why do you need a minimum of 2000 data points?
14 Jul 2008	Guan Wenye	For fewer points, you may get incorrect result :).
10 Nov 2008	mehak gandhi	is the program supposed to run slow
01 May 2009	Guan Wenye	to mehak gandhi :it would definitely runs faster if you code it in C or Fortran
27 May 2009	meysam abed	dear Guan have you checked your DFA code with the code in Physionet.org and it's sample data with results???
05 Jun 2009	Guan Wenye	hi meysam abed it is consitent with the program provided by oxford univ www.eng.ox.ac.uk/samp/dfa_soft.html i have checked with it
15 Jul 2009	Andy Daubenspeck	The file dfm.m seems to be truncated at 26 lines leaving the for-loop unfinished.
23 Nov 2009	Jefferson Willes	Dear Guan, the function output "function output1 = DFA (DATA, win_length, order)" with which data have to enter: DATE, win_length, order??

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Tag Activity for this File
Tag	Applied By	Date/Time
fractals	Guan Wenye	22 Oct 2008 09:59:54
detrended fluctuation analysis	Guan Wenye	22 Oct 2008 09:59:54
dfa	Guan Wenye	22 Oct 2008 09:59:54
chaos	Guan Wenye	22 Oct 2008 09:59:54
fractal	Guan Wenye	22 Oct 2008 09:59:54
selfaffinity	Guan Wenye	22 Oct 2008 09:59:54
detrended fluctuation analysis	Oskar Vivero	08 Apr 2009 12:16:13
dear guan	Jefferson Willes	23 Nov 2009 20:34:47
win_length	Jefferson Willes	23 Nov 2009 20:34:48
the function output function output1 dfa data	Jefferson Willes	23 Nov 2009 20:34:48
order with which data have to enter date	Jefferson Willes	23 Nov 2009 20:34:48
order	Jefferson Willes	23 Nov 2009 20:34:48

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