On Sun, 27 Jan 2013 22:07:53 +0100 (CET) "[email protected]" <[email protected]> wrote:
> 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? Hello Francesco, sorry for delay: I have been examining adehabitat code, but I have no idea on why the two results differ so much. If you post or link the equations you are using in your plugin I hope that others (Clément most probably) can help you. > Thanks > > Francesco All the best! Anne > >----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 > > > > -- http://wiki.osgeo.org/wiki/User:Aghisla
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