GRASS vector attribute table read into R

3 messages · stephen sefick, Roger Bivand, Sarah Goslee

Original

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Mon, Oct 18, 2010 3:59 PM #

I would like to just read in a vector table that is stored in the
GRASS dbf format into R.  Is there a way that I am over looking with
the spgrass6 package?  I can just go to the dbf file of the grass
mapset, but I was looking for a better option.  Thanks in advance.
kindest regards,

Stephen Sefick
____________________________________
| Auburn University? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? |
| Department of Biological Sciences? ? ? ? ?? |
| 331 Funchess Hall? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? |
| Auburn, Alabama? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? |
| 36849? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? |
|___________________________________|
| sas0025 at auburn.edu? ? ? ? ? ? ? ? ? ? ? ? ? ?? |
| http://www.auburn.edu/~sas0025? ? ? ? ? ?? |
|___________________________________|

Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods.? We are mammals, and have not exhausted the
annoying little problems of being mammals.

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? -K. Mullis

"A big computer, a complex algorithm and a long time does not equal science."

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? -Robert Gentleman

Roger Bivand

Tue, Oct 19, 2010 1:24 PM #

On Mon, 18 Oct 2010, stephen sefick wrote:

Stephen,

Do you mean read the GRASS vector, or just the DBF file? If the vector 
with its attributes, readVECT6() in spgrass6, which I think you know of. 
Otherwise, perhaps:

zz <- execGRASS("db.select", parameters=list(table="newbugs"),
   intern=TRUE)
con <- textConnection(zz)
zzz <- read.table(con, header=TRUE, sep="|")
close(con)

Hope this helps,

Roger

____________________________________
| Auburn University? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? |
| Department of Biological Sciences? ? ? ? ?? |
| 331 Funchess Hall? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? |
| Auburn, Alabama? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? |
| 36849? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? |
|___________________________________|
| sas0025 at auburn.edu? ? ? ? ? ? ? ? ? ? ? ? ? ?? |
| http://www.auburn.edu/~sas0025? ? ? ? ? ?? |
|___________________________________|

Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods.? We are mammals, and have not exhausted the
annoying little problems of being mammals.

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? -K. Mullis

"A big computer, a complex algorithm and a long time does not equal science."

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? -Robert Gentleman
_______________________________________________
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R-sig-Geo at stat.math.ethz.ch
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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

Sarah Goslee

Tue, Oct 19, 2010 1:26 PM #

An even more straight-forward way is to use read.dbf() from the
foreign package.

Sarah

On Tue, Oct 19, 2010 at 4:24 PM, Roger Bivand <Roger.Bivand at nhh.no> wrote:

Sarah Goslee
http://www.functionaldiversity.org