help on programing
On Fri, 16 Jun 2006, zhijie zhang wrote:
Dear friends, I want to finish the following task, hope someone to give the R programs,thanks.
Could I ask for a little clarification?
*step1*: Generate a planar x(0,100)*y(0,100) ;
This is a 0,100 by 0,100 square, right?
*step2*: Divide the planar into 100 grids,either use the number of grids or use the coordinates of x/y;(like gridpts(poly,npts,xs,ys) #gridpts(splancs),)
How many grid cells do you need, 100 or 100 by 100?, that is npts=100 or xs=100,ys=100?
*step3*: generate the spatial points with autocorrelation, and link points with the grid center;
Are the points from a point process model, in which case do you want clustered or regular? And if so, do you want to assign them to the grid cells (I think so)? Roger
how to do that ? Because of poor R programing techniques, I hope someone will spend a few minutes to help me. Any suggestions are greately welcome! Hope to get the programs as soon as possible. With kind regards, Wei,Chang [[alternative HTML version deleted]]
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Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 e-mail: Roger.Bivand at nhh.no