making a grid of points

Ross

I think you want

?expand.grid

BTW, help.search('grid') finds this.

Cheers ......

Peter Alspach
-----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

______________________________________________
R-help at stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

______________________________________________________

The contents of this e-mail are privileged and/or confidenti...{{dropped}}
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

______________________________________________
R-help at stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

______________________________________________________

The contents of this e-mail are privileged and/or confidential to the
named recipient and are not to be used by any other person and/or
organisation. If you have received this e-mail in error, please notify
the sender and delete all material pertaining to this e-mail.
______________________________________________________
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