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#ifdef HAVE_CONFIG_H
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#include <config.h>
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#endif
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#endif
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#include <Rmath.h> /* for imax2(.),..*/
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#include <Rmath.h> /* for imax2(.),..*/
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#include "R_ext/Applic.h"
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#include <R_ext/Applic.h>
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/*  Fast Fourier Transform
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/*  Fast Fourier Transform
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 *
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 *
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 *  These routines are based on code by Richard Singleton in the
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 *  These routines are based on code by Richard Singleton in the
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 *  book "Programs for Digital Signal Processing" put out by IEEE.
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 *  book "Programs for Digital Signal Processing" put out by IEEE.