SAS Note V6-SPECTRA-G727

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Date: Wed May 10 2000 - 10:19:03 EDT

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    V6-SPECTRA-G727 *** ALERT NOTE *** PRODUCT: ETS

    TITLE: Incorrect results produced for large time series

    KEYS: INCORRECT RESULTS LARGE SPECTRA FOURIER TRANSFORM INCORROUT INCORRSTAT

        The Fourier coefficients and other spectral analysis statistics computed
        by PROC SPECTRA may be computed incorrectly if the length of the input
        time series is greater than 20,000.

        Fourier coefficients for affected time series can be computed correctly
        using the FFT function in SAS/IML.

    +------REPORTED------+ +---FIXED---+
    SYSTEM RELEASE LEVEL RELEASE LEVEL

    CMS 6.08 TS404
    MVS 6.08 TS404
    VMS 6.08 TS404
    CMS 6.09 TS450
    MVS 6.09 TS450
    VMS 6.09 TS450
    AIX/R 6.11 TS020
    HP800 6.11 TS020
    IABI 6.11 TS040
    MIPS ABI 6.11 TS040
    OSF/AXP 6.11 TS040
    OS/2 6.11 TS020
    Solaris 6.11 TS020
    Windows 6.11 TS020
    WIN/NT 6.11 TS040
    Win95 6.11 TS040
    AIX/R 6.12 TS020
    DigitUnx 6.12 TS040
    HP800 6.12 TS020
    Macintosh 6.12 TS040
    OS/2 6.12 TS020
    Solaris 6.12 TS020
    VMS/AXP 6.12 TS020
    Windows 6.12 TS020
    WIN/NT 6.12 TS020
    Win95 6.12 TS020



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