Query '' retrieved 7 of 7 matches in 0.245 sec.ġ. usr/local/src/sphinx-0.9.9-rc2/api# php -q test-geo.php -h 127.0.0.1 -i location -fr created_at 1283008618 1283181418 -l 1 stepgeodist creates a specification of a recipe step that will calculate the distance between points on a map to a reference location. Here's one example with geofilter and without it: Sphinx would calculate geo distance for all attributes even if there are other filters that would potentially limit the amount of data to process significantly. Main | My View | View Issues | Change Log | RoadmapĠ000581: geodistance optimization with other attribute filters > I expect there's a straightforward way to do this.Anonymous | Login | Signup for a new account > (b) sum up the results of these computations, returning a value which I, doing computations involving variables > For every observation i, I think I need to > loop over all observation and sum up the results. > latitude for each observation, and computation of the distance from any R calculate distance in miles using 2 latitude & 2 longitude vectors in a data frame for 18k rows. > distances between observation i and all j n.e. > The variable created is a weighted sum of the inverse of geographical > I have need to use information from all observations (about 1800 of > running sum, take a look at -help sum(). > If you want the total of a variable, look at -egen, total(). > the easiest is simply to -generate- a sum by adding values with a "+" ![]() > Creating sums can mean different things in Stata. sum up the results of these computations,". > to all other observations (or more generally, to some set of other > observation, the sum I'm talking about is of measurements made relative > Thanks, I guess I was unclear on this aspect of the problem. > To: Subject: st: RE: RE: AW: Creating index relative to other observations > On Fri, at 7:49 AM, Frederick Guy wrote: > geodist lat lon `=lat' `=lon' if _n != `i', gen(d) > * This example require my -geodist- program available on SSC > is then updated with the value of the sum plus the value of x2 for > according to the distance to `i' and summed. > distance from observation `i' to all others (distance will be missing > Perhaps the following example is close to what you are trying to do. > To: Subject: Re: st: RE: RE: RE: AW: Creating index relative to other observations If I just stack observations type i on top of observations type j, geodist doesn't like the missing values (observations type i have missing values for type j, and vice versa). For each location of type i, I need to compute the distances to every location of type j. > Robert Picard sent the code below, which works as advertised - many thanks, Robert! Now I have a slightly different problem: I have two kinds of locations in the data, i and j. Geodist lat1 lon1 `=lat2' `=lon2', gen(d) ![]() The package provides data on countries and their main city or agglomeration and the different distance measures and dummy variables indicating whether two countries are contiguous, share a common language or a colonial relationship. * This example require my -geodist- program available on SSC The goal of geodist is to provide the same data from GeoDist ready to be used in R (i.e. ![]() Updated version of my example the looping is over all observations of Set of observations side-to-side and it's easier to manage. Phylogenetic plots were created using the R packages ggtree, ouch and treeio 11,12,13. To append both datasets but to do an unmatched merge. coordinates with the geodist function in package geodist 10. Usage geodist( x, y, paired FALSE, sequential FALSE, pad FALSE, measure 'cheap', quiet FALSE ). If you have two kinds of locations, then the easiest solution is not Convert one or two rectangular objects containing lon-lat coordinates into vector or matrix of geodesic distances in metres. Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at.
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