Le mercredi 02 novembre 2005 à 16:51 +0100, Frederic Parrenin a écrit : > Hi Jean, > > > > I would like to do various operations on (x_i,y_i) series in gnumeric, > > > e.g.: > > > - resampling, by simple interpolation or by integration, with a linear, > > > spline or staircase interpolant > > > - filtring by various methods > > > - smoothing by various methods > > > - fitting > > > - principal components > > > - Periodogram > > > - etc. > > > Do you want to implement that in sheets, in graphs, or both? > > Both sheets and graphs have already more regressions than linear. > > I thought in sheets.
OK, but I feel many of them would be nice in graphs too. > There is one specific thing I would like to do in graphs. > It is a visual correlation tool for two XY series. With that tool, you > can stretch the X-scale of a serie to fit with another serie. > This tool is available in a free software called AnalySeries, > unfortunately only available on the Mac. This might be possible with two x-axis. It might be possible to adjust one of the axis scale (I mean automatically adjust, not by hand, of course). > This software also do the various math operations on XY series I > described above. Its author (Didier Paillard) is a colleague/friend of > me, so we could collaborate with him. > For example, we could extract the math from AnalySeries into a library > and use it in this gnumeric plugin. The code must be release under the GPL. > > I hopee we can collaborate on that. I'm interested by these features > > too. > > Very good! > I think I can understand and write the math algorithms, but I am a > newbie in terms of UI programming. I can probably also do some work on the maths (although I did not made much maths during the last 30 years). _______________________________________________ gnumeric-list mailing list gnumeric-list@gnome.org http://mail.gnome.org/mailman/listinfo/gnumeric-list
