Re: [R-sig-Geo] (no subject)

2009-04-09 Thread x wong
Roger, I got the package. This is great. Thank you very much, I will have a test run very soon. Have a nice weekend! X.W. On Thu, Apr 9, 2009 at 2:42 PM, Roger Bivand wrote: > On Thu, 9 Apr 2009, x wong wrote: > > I do use Windows, and thank you very much for the help! >> >

Re: [R-sig-Geo] (no subject)

2009-04-09 Thread x wong
vided doesn't work, would you please double check it? X.W. On Thu, Apr 9, 2009 at 3:07 AM, Roger Bivand wrote: > On Wed, 8 Apr 2009, x wong wrote: > > Thank you very much, that is very helpful. >> >> >> x.w. >> >> On Wed, Apr 8, 2009 at 12:47 PM

Re: [R-sig-Geo] (no subject)

2009-04-08 Thread x wong
re suggesting -- how >> about using a least cost path or euclidean distance approach? Both are >> available in many GIS packages (ArcMap, GRASS GIS, etc...) >> >> --j >> >> x wong wrote: >> >>> dear all, >>> >>> >>>

[R-sig-Geo] (no subject)

2009-04-08 Thread x wong
dear all, I have a raster GIS map converted to points. Now, I am trying to calculate the nearest neighbor distance for every point to a cluster of points within this map. Since the number of points is more than two millions, I am wondering whether there is a computation efficient way to do this.