making a grid of points
On Fri, 2006-12-08 at 08:09 +1300, Peter Alspach wrote:
Ross
I think you want
?expand.grid
BTW, help.search('grid') finds this.
Cheers ......
Peter Alspach
I can't believe I missed that--my eye just jumped to all the stuff in the grid package. Thank you.
-----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Ross Boylan Sent: Friday, 8 December 2006 8:03 a.m. To: r-help Subject: [R] making a grid of points I'd like to evaluate a function at each point on a 2 or 3-D grid. Is there some function that already does this, or generates the grid of points? My search has led me to the grid and lattice packages, and I found a reference to the sp package (e.g., SpatialGrid) for this. There are things in there that might be relevant, but at first blush many of them are embedded in other concepts (grobs, shingles, rugs) and don't obviously solve the problem. I know this is not a hard thing to program, but I suspect someone has already done it. Any pointers? Thanks. -- Ross Boylan wk: (415) 514-8146 185 Berry St #5700 ross at biostat.ucsf.edu Dept of Epidemiology and Biostatistics fax: (415) 514-8150 University of California, San Francisco San Francisco, CA 94107-1739 hm: (415) 550-1062
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Ross Boylan wk: (415) 514-8146 185 Berry St #5700 ross at biostat.ucsf.edu Dept of Epidemiology and Biostatistics fax: (415) 514-8150 University of California, San Francisco San Francisco, CA 94107-1739 hm: (415) 550-1062