Re: Fourier transform

[Jean Brefort <jean brefort free fr>]

Hello,

The Fourier function takes three arguments, but only one is needed. The
first argument is a row or column of data to be transformed, the second
is a boolean to select the transform type, direct or inverse, and the
third is another boolean to select to separate real and imaginary parts
of the result (the default is no separation).

The function returns an array of one column of complex numbers or two
columns of real numbers. Each column has a number of data equal to the
power of 2 just above the number of input data (the fft algorithm needs
2^n data, so if you give, let's say 100 numbers, 28 0s will be
appended).

As for all array functions, you need to select the output area, type
the function and its arguments, and validate using Ctrl+Shift+Enter?

Hope this helps,
Jean

Le vendredi 08 février 2019 à 14:19 +0000, Mark Lytle a écrit :
> Hello,
>
> Would like to use the Time Series features of Gnumeric, but the
> online manual doesn't really show syntax.  I did a search on the
> Gnumeric list looking for an example in use, but all I see are
> esoteric discussions, no examples.
>
> Is there another reference with examples of even one of the time
> series features in use? If I could see one, I could figure out the
> rest.
>
> Thanks,
> Mark Lytle
> _______________________________________________
> gnumeric-list mailing list
> gnumeric-list gnome org
> https://mail.gnome.org/mailman/listinfo/gnumeric-list