> Antonio Gallardo wrote: > > >Hi all, > > > >I am starting to work with GSTAT under R, and I would like to know whether > >back-transformation (log transformation) of prediction results is possible > >under GSTAT. Any suggestion is welcome. > > > >Thanks in advance, > > > > > > > R can do the back-transform for you, if it's limited to simply calculating > the exponent. This gives you a median-type estimate on the original > scale. If you want an expectation-type estimate on the original > scale, you'd need the lagrange multiplier to do this and gstat does > not provide this as separate information; you'd have to modify it.
Is it difficult to modify the code? I will need, to do POINT simulations of log-transformed data and back-transform the points. Then aggregate the results to BLOCKS. Ulrich -- __________________________________________________ Ulrich Leopold MSc. Department of Physical Geography Institute for Biodiversity and Ecosystem Dynamics Faculty of Science University of Amsterdam Nieuwe Achtergracht 166 NL-1018WV Amsterdam Phone: +31 20 525 7456 (7451 Secretary) Fax: +31 20 525 7431 Mobile: +31 64 220 3028 Email: [EMAIL PROTECTED] URL: www.science.uva.nl/ibed/research/Research_Fields/fg/stafffg/index.html
