[R] distance matrix to coordinate format for spatial stats
Prof Brian Ripley
ripley at stats.ox.ac.uk
Thu Nov 22 07:56:15 CET 2007
You can't do this uniquely (shifts, rotations and reflection do not change
the distances), but cmdscale() will produce one reconstruction.
On Thu, 22 Nov 2007, Jesse D Lecy wrote:
> I would like to use some of the spatial statistics functions in R, but I am having trouble entering data. My data is already in a distance matrix format, not an X Y coordinate format (each Xij cell in the matrix represens the distance from point i to j). Does anyone know of a way to convert a distance matrix to a ppp object in spatstat, or an X,Y coordinate system for other packages?
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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