I now have both the FFT and the interpolation function working, yes, it was because I hadn't activated all of the plug-ins, that was the trick.
Thank you Frédéric and Jean -------------------------------------------- On Fri, 2/8/19, Frederic Parrenin <frederic.parre...@univ-grenoble-alpes.fr> wrote: Subject: Re: Fourier transform To: "Jean Brefort" <jean.bref...@free.fr>, "Mark Lytle" <mlyt...@sbcglobal.net>, gnumeric-list@gnome.org Date: Friday, February 8, 2019, 11:14 AM Hi Jean, Do you know if there has been work on the periodogram function after Franck's work? I tried the function several times but I never manage to get sensible results. All the best, Frédéric Le 08/02/2019 à 17:27, Jean Brefort a écrit : > 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 > _______________________________________________ > gnumeric-list mailing list > gnumeric-list@gnome.org > https://mail.gnome.org/mailman/listinfo/gnumeric-list _______________________________________________ gnumeric-list mailing list gnumeric-list@gnome.org https://mail.gnome.org/mailman/listinfo/gnumeric-list
