Thanks Anne, as you know i try develop Home Range Analysis using scipy module. Reading the KernelUD documentation is explained how h (smoothing parameter) is calculated using normal kernel (gaussian):
h = Sigma*n^(-1/6) where Sigma = 0.5*(sd(x)+sd(y)) I compared the h value in my plugin and in motore.R module but the results are very different.For example for a test shapefiles : Home Range has 83 value My plugin 0.4 value The value coming from Home Range it seems strange. Do you have any suggestions? Thanks Francesco >----Messaggio originale---- >Da: [email protected] >Data: 27/01/2013 21.53 >A: <[email protected]> >Cc: "[email protected]"<[email protected]> >Ogg: Re: [AniMov] Value h (smoothing parameter) > >On Sun, 27 Jan 2013 18:08:12 +0100 (CET) >"[email protected]" <[email protected]> wrote: > >> Hi all, >> i'm trying to understand the value of smoothing parameter for each >> type of animal used by Home Range Analysis to calculate href kernel >> method. My question is: >> >> is the value in the field h_ref the value of the smoothing paramater? >> >> into the file motore.R there is these lines? >> >> for (i in names(OutputBox[["href.volumes"]])) { >> khr.h[i] <- OutputBox$href.volumes[[i]]$h >> >> } > >Hello Francesco, > >yes, field h_ref contains the smoothing parameter value calculated by >adehabitat function. >You can check the original adehabitat function's documentation, namely >adehabitatHR::kernelUD function, for more details on the >implementation. > >Best, >Anne >-- >http://wiki.osgeo.org/wiki/User:Aghisla > _______________________________________________ AniMov mailing list [email protected] http://lists.faunalia.it/cgi-bin/mailman/listinfo/animov
