[Libreoffice-bugs] [Bug 124205] New: [LOCALHELP] Help page for FOURIER function

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=124205

            Bug ID: 124205
           Summary: [LOCALHELP] Help page for FOURIER function
           Product: LibreOffice
           Version: unspecified
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Documentation
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: olivier.hallot at documentfoundation.org
                CC: olivier.hallot at documentfoundation.org
            Blocks: 80430

As seen in 6.3 release notes

------------8<----------------

FOURIER() function

FOURIER(Array, GroupedByColumns, Inverse, Polar) is a matrix formula that
computes discrete Fourier transform [DFT] of input array (first argument) via a
radix-2, decimation-in-time fast Fourier transform algorithm. tdf#74664 (Dennis
Francis)

The data in input array(first argument) can be:

    grouped by columns (needs to be indicated by flag GroupedByColumns = TRUE).
In this case the array can contain 1 or 2 columns, where the first column
contains the real part of input series and second column if present contains
the imaginary part of the input series. If there is only 1 column, the input
series is treated as purely real. If the number of rows is not a power of 2,
zeroes are appended to the input series internally to make the series length
equal to the next nearest power of 2.
    grouped by rows (needs to be indicated by flag GroupedByColumns = FALSE).
In this case the array can contain 1 or 2 rows, where the first row contains
the real part of input series and second row if present contains the imaginary
part of the input series. If there is only 1 row, the input series is treated
as purely real. If the number of columns is not a power of 2, zeroes are
appended to the input series internally to make the series length equal to the
next nearest power of 2.

The third argument "Inverse" is a boolean flag to indicate whether an inverse
DFT needs to be computed. This argument is optional and the default value is
FALSE.

The fourth argument Polar is a boolean flag to indicate whether the final
output needs to be in polar coordinates. This argument is optional and the
default value is FALSE.

The result of DFT consists of two columns - first column contains the real
parts (or the magnitudes if Polar=TRUE) and second column contains the
imaginary parts (or the phases if Polar=TRUE).


------------8<----------------


Referenced Bugs:

https://bugs.documentfoundation.org/show_bug.cgi?id=80430
[Bug 80430] [META] Documentation gap for new features
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