If you are waiting for improvements about trend lines, Tomaž Vajngerl developed new functionalities:
- polynomial correlation
- moving average
- forced intercept
- extrapolate trend line
- several trend lines per series
- support XLS, XLSX and ODT (?)
https://bugs.freedesktop.org/show_bug.cgi?id=35712#c10
These functionalities are now available in master of LibO (next 4.2) and can be tested in daily builds: Thanks a lot to Tomaž
Careful, it is an alpha version, then still in development. Do not use your real files but copy.
Please let your comments about bugs or improvements on bugs page dedicated to each functionality (check links above).
Regards
Laurent BP