I thought they are in the addons. If not, please feel free to move them there. And thanks again for looking at these. I'm glad they're useful.
Michael ____________________ C. Michael Barton Director, Center for Social Dynamics & Complexity Professor of Anthropology, School of Human Evolution & Social Change Arizona State University voice: 480-965-6262 (SHESC), 480-965-8130/727-9746 (CSDC) fax: 480-965-7671 (SHESC), 480-727-0709 (CSDC) www: http://www.public.asu.edu/~cmbarton, http://csdc.asu.edu On Sep 15, 2013, at 1:42 PM, Moritz Lennert <[email protected]> wrote: > On 14/09/13 21:01, Michael Barton wrote: >> Moritz, >> >> This is a nice addition. > > > Actually, not that nice. I just reread one of the papers you give as > reference [1] and it clearly states that the equation that you use for > estimating the expected mean nearest neighbor distance "cannot be used for > irregularly shaped study areas"... > > >> Thanks, I'm really swamped right now. Do you want to add it to the script >> and add your name to the authors? > > > I'll see what else I can find in the literature about how to calculate the > expected mean distance to see if having the actual study area measures is > really useful. If yes, I'll add the patch myself. > > BTW, shouldn't the scripts v.nn.py and v.lda.py go into the addons svn ? If > you agree then I can add them there, with or without my patch. I've also > locally modified v.lda.py a bit to allow easier (to me at least) use of the > results. > > > Moritz > > [1] http://www.geog.ucsb.edu/~dongmei/ppa/ppa.html > >> >> Michael Barton >> School of Human Evolution&Social Change >> Center for Social Dynamics& Complexity >> Arizona State University >> >> ...Sent from my iPad >> >> On Sep 14, 2013, at 9:11 AM, "Moritz Lennert"<[email protected]> >> wrote: >> >>> Michael, >>> >>> I've attached a patch to your very useful v.nn.py addon script. The patch >>> provides the following: >>> >>> - a change of option names from input1,2 to 'from' and 'to' >>> - the possibility to provide a vector map with polygons giving the contours >>> of the study area for which to calculate the nearest neighbor coefficient - >>> the script just gets the total of all areas and all perimeters in the given >>> map >>> - the possibility to provide numerical values for area and perimeter >>> >>> Even though some people argue that the absolute value of the coefficient >>> does not mean much and that the exact size of the study area does not have >>> an influence on the relative values of the coefficient, I think it is a >>> plus to have the possibility to circumscribe the area. Especially since in >>> its current state the module gets the area and perimenter from the current >>> region and as this is a vector module most people won't even think about >>> region settings. (Running the module in the default n=1 s=0 w=0 e=1 region >>> gives very weird coefficient values. >>> >>> Up to you to decide whether you want to add this into your script. >>> >>> BTW: the script works perfectly in grass7 as well. >>> >>> Moritz >>> <v.nn.py.diff> > > _______________________________________________ grass-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-dev
