No graph was shown: R-help strips most attachments. On Wed, 6 Aug 2003, Jan Verbesselt wrote:
> Dear R Helpers, > > Which technique can I apply to get the noise out of the following graph? > The data displayed shows the seasonal variation of NDVI (vegetation > photosynthesis) extracted from the VEGETATION satellite sensor. It > contains big errors caused by cloud cover, which gives very low values > in the time series (=> outliers have to be deleted). Are there certain > smoothing or filtering techniques I could use? I tested the Holt-winters > filtering and the kernel smoothing technique but none of these give > sufficient results. > > Thanks, > Jan > > Ps: Thanks for the previous answer: setting the dim(Timeserie) <- NULL > was the solution. The aim is to apply the STL function on these results > because at the moment STL runs but results are not logical. > > > ******************************************************* > Jan Verbesselt > Research Associate > Lab of Geomatics and Forest Engineering K.U. Leuven > Vital Decosterstraat 102. B-3000 Leuven Belgium > Tel:+32-16-329750 > Fax: +32-16-329760 > http://perswww.kuleuven.ac.be/~u0027178/VCard/mycard.php?name=janv > ******************************************************* > > -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help