v.kernel has a crazy output option which can be of either type raster or vector, depending on what operation mode the user chooses. No way SEXTANTE can handle this sort of "variable type" output. The only solution is to create two separate wrapper scripts, one for each output type and add those to the GRASS binaries.
Best, Ben ----- Original Message ----- > Ops, I alwasy forget the blacklist :( > We could ask Victor to check if the improvements to the GRASS bindings > can cut a bit that list... > > > 2011/6/28 Antonio Falciano < afalci...@yahoo.it > > > > Hi all, > unfortunately, v.kernel seems to be in the GRASS modules blacklist, so > it's not accessible from SEXTANTE now. Maybe, in the future? > We talked about KDE in this thread in the past: > https://lists.forge.osor.eu/pipermail/sextante-users/2009-November/000124.html > There are other useful informations here: > http://en.wikipedia.org/wiki/Kernel_%28statistics%29 > such as the commonly used kernel functions: > http://en.wikipedia.org/wiki/Kernel_%28statistics%29#Kernel_functions_in_common_use > I think it's not hard to implement other kernel functions into the > "Density (kernel)" tool. I'm quite busy at the moment, otherwise I > would try to do it. > > Cheers, > Antonio > > Il 28/06/2011 11.13, G. Allegri ha scritto: > > > Through Sextante you can use GRASS, which implements you many more > > kernels: > > http://grass.meteo.uni.wroc.pl/grass65/manuals/html65_user/v.kernel.html > > > > giovanni > > > > 2011/6/28 Benjamin Ducke > > > > > > > Hi Joachim, > > > > The tool computes a Kernel Density Estimate (KDE), > > which is a continuous estimation of a probability > > function for all cells in your dataset. > > > > SEXTANTE's implementation uses a Gaussian kernel. > > Other kernel types are not currently implemented. > > > > More details here: > > > > http://en.wikipedia.org/wiki/Kernel_density_estimation > > > > Best, > > > > Ben > > > > ----- Original Message ----- > > > Dear sextante experts, > > > > > > we are using the Density tool with the "kernel". No technical > > > problems, but three practical questions: > > > > > > - we are looking for the data output of the function. Where is it > > > ? How can we get it ? > > > - the result of the kernel function is definitely good looking. > > But we > > > can't explain it. What does the gradient represent ? Is it a real > > > gaussian standard distribution, or what ? > > > - how would we proceed to obtain a similar output, but with a > > > linear gradient or a gravitational (1/d^2) gradient ? > > > > > > Many thanks, > > > > > > Joachim > > > _______________________________________________ Sextante-users > > mailing > > > list Sextante-users@lists.forge.osor.eu > > <mailto: Sextante-users@lists.forge.osor.eu > > > > > https://lists.forge.osor.eu/listinfo/sextante-users > > > > > > ------ Files attached to this email may be in ISO 26300 format > > (OASIS Open > > Document Format). If you have difficulty opening them, please visit > > http://iso26300.info for more information. > > > > _______________________________________________ Sextante-users > > mailing list > > Sextante-users@lists.forge.osor.eu <mailto: > > Sextante-users@lists.forge.osor.eu > > > > https://lists.forge.osor.eu/listinfo/sextante-users > > > > > > > > > > _______________________________________________ > > > Sextante-users mailing list > > Sextante-users@lists.forge.osor.eu > > https://lists.forge.osor.eu/listinfo/sextante-users > > -- Antonio Falciano > http://www.linkedin.com/in/antoniofalciano > _______________________________________________ > > > > Sextante-users mailing list > Sextante-users@lists.forge.osor.eu > https://lists.forge.osor.eu/listinfo/sextante-users > > > > _______________________________________________ Sextante-users mailing > list Sextante-users@lists.forge.osor.eu > https://lists.forge.osor.eu/listinfo/sextante-users ------ Files attached to this email may be in ISO 26300 format (OASIS Open Document Format). If you have difficulty opening them, please visit http://iso26300.info for more information. _______________________________________________ Sextante-users mailing list Sextante-users@lists.forge.osor.eu https://lists.forge.osor.eu/listinfo/sextante-users
