Multifractal detrended fluctuation analyses

上传者: shg736940118 | 上传时间: 2021-05-12 13:38:09 | 文件大小: 7.12MB | 文件类型: ZIP
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 by computing alpha (or Hurst exponent H).It is useful for analysing time series that appear to be long-range dependent processes. However, the conventional DFA only scale the second order statistical moment and assumes that the process are normal distributed. MFDFA1 and MFDFA2 in the present zip-folder computes the H(q) for all q-order statistical moments as well as the local Hurst exponent H(t). Furthermore, H(q) and H(t) are also used to compute the multifractal spectrum D(h) by a legendre transform of H(q) or directly from the histogram of H(t). If the codes are used in scientific publications please cite Ihlen (2012) contained in the zip-folder

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