is.constant
(Package: GeneCycle) :
Simple Check for Constant Time Series
is.constant is a utility function that checks whether a time series is constant.
● Data Source:
CranContrib
● Keywords: ts
● Alias: is.constant
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dominant.freqs
(Package: GeneCycle) :
Dominant Frequencies in Multiple (Genetic) Time Series
dominant.freqs returns the m dominant frequencies (highest peaks) in each of the periodogram computed for the individual time series.
● Data Source:
CranContrib
● Keywords: ts
● Alias: dominant.freqs
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fisher.g.test
(Package: GeneCycle) :
Fisher's Exact g Test for Multiple (Genetic) Time Series
fisher.g.test calculates the p-value(s) according to Fisher's exact g test for one or more time series. This test is useful to detect hidden periodicities of unknown frequency in a data set. For an application to microarray data see Wichert, Fokianos, and Strimmer (2004).
● Data Source:
CranContrib
● Keywords: htest
● Alias: fisher.g.test
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Internal GeneCycle functions.
● Data Source:
CranContrib
● Keywords: internal
● Alias: dominant.freqs.single, fisher.g.test.single, is.constant.single, periodogram.freq, periodogram.spec, periodogram.spec.single
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avgp
(Package: GeneCycle) :
Average Periodogram for Multiple (Genetic) Time Series
avgp calculates and plots the average periodogram as described in Wichert, Fokianos and Strimmer (2004).
● Data Source:
CranContrib
● Keywords: ts
● Alias: avgp, avpg
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robust.g.test
(Package: GeneCycle) :
Robust g Test for Multiple (Genetic) Time Series
robust.g.test calculates the p-value(s) for a robust nonparametric version of Fisher's g-test (1929). Details of this approach are described in Ahdesmaki et al. (2005), along with an extensive discussion of its application to gene expression data. From GeneCycle 1.1.0 on the robust regression based method published in Ahdesmaki et al. (2007) is also implemented (using Tukey's biweight based M-estimation/regression.)
● Data Source:
CranContrib
● Keywords: htest
● Alias: robust.g.test, robust.spectrum
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periodogram
(Package: GeneCycle) :
Periodogram Power Spectral Density
periodogram is a wrapper function for spectrum with some special options set. It returns the power spectral density, i.e. the squared modulus of the Fourier coefficient divided by the length of the series, for multiple time series as well as the corresponding Fourier frequencies. The frequencies range between 0 and the Nyquist critical frequency fc = frequency(x)/2.
● Data Source:
CranContrib
● Keywords: ts
● Alias: periodogram
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