Margherita, Actually, my approach with be little changed either way; without know of a better GRASS-only approach, the kind of thing I have done is to:
(1) write-out to a text file for all grids x, y, value (2) index the lines, producing, id, x, y, value (3) in R randomly sample the index (4) from (3) you have id, x, y, value for the random sample (5) import (4) into grass using v.in.ascii This will take a little scripting… Best, Tom On Tue, Feb 17, 2015 at 8:49 AM, Margherita Di Leo <direg...@gmail.com> wrote: > Hi, > > I have a vector of points. According to a regular grid, I need to > (randomly) sample a certain number n of these points in each cell of the > grid. Such number n is given in a column of the attribute table of the > grid. How would you do this? > I have half idea to play with the coordinates and Monte Carlo, but I have > the feeling that I'm not thinking GIS and there must be a easier way. > > Thank you for any hint > > -- > Best regards, > > Dr. Margherita DI LEO > Scientific / technical project officer > > European Commission - DG JRC > Institute for Environment and Sustainability (IES) > Via Fermi, 2749 > I-21027 Ispra (VA) - Italy - TP 261 > > Tel. +39 0332 78 3600 > margherita.di-...@jrc.ec.europa.eu > > Disclaimer: The views expressed are purely those of the writer and may not > in any circumstance be regarded as stating an official position of the > European Commission. > > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user > -- Thomas E Adams, III 718 McBurney Drive Lebanon, OH 45036 1 (513) 739-9512 (cell)
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